Question # 1

The product of moment of inertia and angular velocity is called

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Angular momentum

Kinetic energy

Torque

Work

On Celsius scale boiling point of water is taken as

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0°C

100°C

180°C

None of these

If the velocity of a body changes by equal amount in equal intervals of time, the body is said to have

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acceleration

uniform acceleration

instantaneous acceleration

uniform velocity

If two non-zero vector A and B are parallel to each other.then A .B is equal to

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Zero

AB

A + B

A-B

A student measured the diameter of a wire using a screw gauge with least count 0.001cm.The correct measurement is

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5.3 cm

5.32 cm

5.320 cm

5.3200 cm

The energy of photon of energy 1 eV is:

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1240 nm

1040 nm

1000 nm

620 nm

The perpendicular distance form the line of action of force to the pivot point is called

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couple arm

angular distance

moment arm

none of them

Velocity time graph can never be perpendicular to time axis,it implies

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Zero acceleration

Zero velocity

Infinite acceleration

Zero displacement

In YDS experiment, the condition for constructive interference of two coherent waves is that the path difference should be

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Integral multiple ofλ/2

Integral multiple ofλ

Even integral multiple ofλ/2

Both A and C

What is the Young modulus of a meta?

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Extension/force

Force/extension

Strain/stress

Stress/strain

The magnitude of torque determines its

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Linear acceleration

Angular acceleration

Moment arm

None of these

Newton's rings are formed as a result of

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diffraction of light

dispersion of light

interference of light

polarization of light

The body is in equilibrium when it is in a state of

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Accelerated motion

Uniform motion

Rest or uniform motion

None of these

The second law gives the relationship between

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mass and velocity

force and acceleration

velocity and acceleration

mass and weight

If momentum is increased by 20% then K.E. increases by

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44%

55%

66%

77%

Bernoulli s equation is applicable on

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Non viscous fluid only

Incompressible fluid only

Stream line flow

Ideal fluid

A car travels due east on a level road for 3 km. it then turns the North at an intersection and travels 4 km before stopping.The magnitude of the resultant displacement of car is

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5 km

7 km

1 km

11 cm

Conductors are those materials in which energy gap is

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very large (several eV)

very narrow (= 1eV)

either of them

none of them

If P is the pressure and V is the volume, Then PV will represent:

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Power

Work

Force

None of these

Which characteristics of wave, established the Huygen's wave theory in 1801?

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polarization

interference

propagation

all of them

The projectile is the motion which is

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One dimensional

Two dimensional

Three dimensional

None of these

A ballistic missile is

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Unpowered

Unguided

Both

None of these

The study of properties of fluid at rest is called

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Fluid dynamic

Fluid statics

Both a and b

dynamics

Hard magnetic materials are

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Iron

Steel

Alnico

None of these

The concentration in solution can be determined by the property known as

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Solubility

Insolubility

Optical activity

None of these

Base quantities are

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Scalars

Vectors

Both

None of these

X-ray crystallography can be used to get what information about the structure of a compound?

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the bond angles in a molecules

the number of molecules per unit cell

a picture of the electron density in a unit

all of them

When a vector is multiplied by a scalar, the product of the quantity will be

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A new vector quantity

New direction

Same direction

a and c

A non-uniform beam of weight 50 N is 2 m long and is supported on a pivot situated in the exact middle of the beam. The centre of gravity of the beam is 0.5 m ot the right of the point where the pivot touches the beam. What weight has to be added to the left side of the beam so that the beam stays perfectly balanced (in equilibrium)?

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25 N

12.5 N

50 N

Not enough information to answer the question

In a uniform circular motion (horizontal) of a ball tied with a string,velocity at any time is at any angle θ is

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θ = 60°

θ = 30°

θ = 90°

None of the above

The phase difference between two points on a wave front will be

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0°

4π

2π

π/2

Graham Bell photo phone used a modulated beam of

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Reflected sun light

Refracted sun light

Diffracted sun light

None of these

A one microfarad capacitor of a TV is subjected to 4000 V potential difference The energy stored in capacitor is

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8 J

16 J

4 x 10^-3 J

2 x 10^-3 J

Deceleration means the speed of the body is

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Increasing

Decreasing

Just moving

None of these

A spinning cricket ball suffers

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An extra height

An extra velocity

An extra curvature

None of these

The entity which measures the quantity of motion in a body is called

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force

energy

momentum

power

The time of flight of a projectile motion equals to

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half of the time to reach maximum height

twice the time to reach maximum height

one fourth of time to reach maximum height

time to reach maximum height

If no external torques act, the angular momentum of a body rotating about a fixed axis in two dimensions is

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Variables

Constant

Non conserved

None

A process in which no heat enters or leaves the system is called.

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Adiabatic process

Isothermal process

Isochoric process

None of these

Fast moving atomic particles, accelerated in an accelerator are applicable to the new branch of Physics is

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Newtonian mechanics

Relativistic mechanics

Classical mechanics

None of these

In integers such as 8,000 Kg, significant zeros are determined by the instrument when least count is 1 Kg

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8.00 × 10³ Kg

8.000 × 10³ Kg

8.00 × 10³ Kg

8.0 × 10³ Kg

A valance band in solids is

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Always completely filled

Empty

Either completely or partially filled

None

The interference fringes are of

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equal width

variable width

zero width

non-uniform width

In semiconductors, the valence band at room temperature is

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Completely filled

Partially filled

Empty

None of these

SI unit of temperature

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Centigrade

Celsius

Kelvin

All of these

In case of YDS experiment, the distance of the mth bright fringe on the screen from center is

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Y = (m + 1)λL/d

Y = mλL/d

Y = (m + 1/2)λL/d

None of these

Signal from a remote control to the device operated by it travels with the speed of:

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Sound

Light

Ultrasonics

Supersonics

A force of 10 N displace an object by 10 m.If work done is 50 J then direction of force makes an angle with direction of displacement.

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120°

90°

60°

None of these

Energy stored in the spring of watch is called

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Gravitational P.E.

Potential energy

Elastic potential energy

None of these

The rightward forces acting on a body in equilibrium are taken as

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negative

positive

either negative or positive

none of them

1 torr = --------------------

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1.20 Nm^-2

1.38 Nm^-2

1.33 Nm^-2

1.31 Nm^-2

The resultant of two equal forces is double of either of the force.The angle between them is

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0°

60°

90°

120°

The rate of change of angular velocity is called

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Angular displacement

Angular acceleration

Instantaneous velocity

None of these

N-type crystal is

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Neutral

Positively charged

Negative charged

None of these

The property of bending of light around the obstacle is known is

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Interference

Polarization

Diffraction

None of these

The amount of work done in bringing a unit positive charge from infinity to a point is called

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Potential

Potential difference

Absolute potential

None of these

The energy due to all the fossil fuels on the Earth is so small that, the energy reaching Earth in just days of sunlight which is

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5 days

10 days

30 dyas

60 days

Those quantities which can be measured accurately are known as

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Physical Quantities

Scalar Quantities

Vector Quantities

Non Physical Quantities

Every crystalline solid has

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definite melting point

different melting points

may or may not be definite

none of them

Confining the light vibrations in one plane is called:

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Reflection of light

Interference of light

Polarization of light

Diffraction of light

A particle of mass 'm' at rest is acted upon by a force 'P' for a time 't' its kinetic energy after an interval 't' is

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P²t²/m

P²t²/2m

P²t²/3m

Pt/2m

A wire can support a load W without breaking. It is cut into two equal parts. The maximum load that each part can support is:

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W/4

W/2

W

2 W

The magnetism produced by electrons within an atom is due to

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Spin motion

Orbital motion

Spin and orbital motion

None of these

Linear momentum is a vector quantity and has direction of

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Its displacement

Velocity

Acceleration

None of these

The idea of Michelsion's interferometer is based on the

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reflection of light

interference of light

refraction of light

all of them

When interference of light takes place

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Energy is created in the region of maximum intensity

Energy is destroyed in region of maximum intensity

Conservation of energy hold goods and energy is redistributed

Conservation of energy does not hold good

Geysers usually occur in

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Hot regions

Cold region

Volcanic regions

All of these

The cross product of parallel vectors has magnitude

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Maximum value

Minimum value

Zero

None of these

A Celsius degree is larger than a Fahrenheit degree by

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5/9

9/5

9/10

9/8

The fringe spacing in case of red light

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Increases

Decreases

Remains the same

None of these

Systematic error refers to an effect that influences particular quantity for the measurements which are

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All

Some

None

a and b

In a diffraction fringes pattern the fringes are

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Equally spaced

Wider near the centre and narrower away from it

Narrower near the centre and Wider away from it

None of these

The pressure P of a gas at constant temperature varies with its density P

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Directly

Inversely

Equal

None of these

The maximum energy of the photoelectrons depends upon:

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Frequency of incident light

Intensity of incident light

Nature of metal

Both (a) & (c)

Every crystalline solid has a melting point

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Definite

Not definite

Any

Change every time

Which part of the spectrum is most visible?

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Red

Violet

Yellow

Yellow-green

Viscus force between two layers depends on

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Relative velocity of the layers

Distance between layers

Surface area of layers

All of these

Which one of the following is nearly monochromatic

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Light from candle

Light from simple lamp

Light from sodium lamp

Light from sun

A proton is about 1840 times heavier than an electron When it is accelerated by a potential difference of 1 kV,its kinetic energy will be:

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1840 keV

1/1840 keV

1 keV

920 keV

The total linear momentum of an isolated system remains

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Constant

Variable

Zero

None of these

The expression of energy stored in an inductor of length L and current I can be expressed by a relation

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1/2 LI²

1/2 I²L

1/2 I²L²

1/2 IL

If an electron has an initial velocity in a direction different from that of an electric field the path of

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Straight line

Circle

Ellipse

Parabola

Which quantity has different units from the others

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Mass X velocity

Force X time

Energy / velocity

Power X time

Which of the following quantities is a vector

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Volume

Temperature

Displacement

Density

The SI unit of stress is some as that of:

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Pressure

Momentum

Impulse

Change momentum

Force

Generally thermometers make use of the fact that most of the liquids

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Compress on heating

Expand on heating

Evaporate on heating

Sublime on heating

If we know the refractive index of glass, speed v of light in the glass can be found by

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v = c n

v = c/n

v = n/c

None of these

The band full of electrons, which donot play any part in the conduction process is known as

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Conduction band

Forbidden energy band

Valence band

Completely filled band

The oil drop gets charged when it

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Pass through the medium

Pass through the atomizer

Light falls on it

All of them

A glass plate on which a large number of very fine equidistant parallel lines are drawn is called

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convex lens

thin film

diffraction grating

interferometer

Resolving power of a telescope depends on:

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The magnification of eyepiece

The focal length of objective lens

Diameter of objective lens

Refractive index of objective lens

Viscosity of glycerin at 30^oC in Nsm^-2

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6.12 × 10^-3

6.18 × 10^-3

6.29 × 10^-3

6.79 × 10^-3

Dimension of impulse is same as that of

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Force

Torque

Momentum

Angular momentum

Numerical value of magnitude of a physical quantity is

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Independent of system of units

Directly proportional to magnitude of the unit

Inversely proportional to magnitude of the unit

Either (B) or (C)

De-Broglie received the Nobel prize on his work on:

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Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

The decrease in potential energy of a ball of mass 20 kg which falls from a height 50 cm is:

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968 J

98 J

1980 J

None of these

Which of the following is a scalar quantity

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Density

Displacement

Torque

Weight

Vectors are those physical quantities which requires

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Magnitude

Magnitude and directions

Direction

None of these

The light which has components in all directions is called

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unpolarized light

polarized light

intense light

none of them

If V denotes volume of the liquid coming out of a pipe per second, v is velocity and A as area of the pipe, then the correct formula will be:

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V = v x A

v = V x A

A = v x V

None of these

A microscope has an objective lens of 10 mm focal length and an eye piece of 25.0 mm focal length what is the distance between the lenses

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≈ 200 mm

≈ 210 mm

≈ 213 mm

≈ 233 mm

An orbital motion in which an artificial satellites adopts

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Circular path

Nearly circular path

Elliptic

None of these

The two forces of a couple do not follow the rule that

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They act on the same angle

They act in the opposite directions

They have same directions

They cancel out each other

What type of science is Physics

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Living things

Non-living things

Experimental science

None of these

A tank full of liquid has an orifice 4.9 m below the surface level in the tank, the velocity of out coming liquid is

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4.9 ms^-1

9.8 ms^-1

2 x 9.8 ms^-1

4 x 9.8 ms^-1

A box of mass 2 kg is at rest on top of a 0.75m high table. The weight of the object is 19.6 N. if the object is moved so that it falls to the ground, what will be the weight of the object after it has fallen 0.1 metre distance?

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19.2 N

19.6 N

19.8 N

not possible to determine from the given information

The magnetic field produced due to the current in a straight wire is proportionalto the :

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Electric current

Conducting material

Length of the wire

Diameter of the wire

The center of gravity is also called

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Centre of mass

Centre of body

Centre of force

None of these

Young's modulus for brass is

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40

60

90

91

In a full wave rectifier, the diode conducts during

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Both halves of the input cycle

A portion of the positive half cycle of the input

Positive half cycle of the input

Both halves of the input cycle

SI unit of potential difference is volt it can be written as

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JC^-2

JC^-1

JC

J.A

If the direction of the applied force is reversed then

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Its torque remain unchanged

The magnitude of its torque changes and direction of the torque remains the same

The magnitude of its torque remains the same but the direction of the torque reverses

Torque is also reversed

Dolphins have bodies to assist their movement in water are

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Irregular bodies

Closer to streamline body

Stream lined bodies

None of these

Blood vessels are not

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Flexible

Rigid

Some times flexible

None of these

In single slit diffraction the condition for second minimum is

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Sinθ = λ

d Sinθ =2λ

d Sinθ =3λ

d Cosθ =0

A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h.The force required to stop the vehicle in 10s force required to stop the vehicle in 10s is:

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120 x 10.8 N

180 N

720 N

360 N

In thin film colours are due to

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Reflection

Interference

Diffraction

Refraction

Moment of inertia of a sphere is

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1/3 mr²

3/4 mr²

4/5 mr²

2/5 mr²

Which of the following spectrum have all the frequencies from high to low frequency range?

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Band spectrum

Continuous spectrum

Line spectrum

Discontinuous spectrum

An object is placed at a distance of 200 cm from a convex lens of focal length 10 cm the linear magnification is

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1/3

2/3

3/4

None

Stoke s law is applicable to

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Very fast moving objects only

Only stationary objects

Slow moving objects

All

Internal friction of a fluid is called

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Surface tension

Resistance

Viscosity

None of these

At high speed and for long trajectories the air friction is

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Negligible

Equal to gravity

More than gravity

None of these

If the dot product of two non-zero vectors vanishes,the vectors will be

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In the same direction

Opposite to each other

Perpendicular to each other

Zero

If Young s double slit experiment is immersed in water then the fringes with

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Decreases

Remains unchanged

Becomes infinite

Increases

The study of fluids is relatively complicated, this can be simplified by using

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Law of conservation of energy

Law of conservation of mass

Law of conservation of momentum

a and b

For fast moving particles, such as atomic particles in an accelerator, the following branch of physics is applicable

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newtonian mechanics

classical mechanics

relativistic mechanics

all of them

Polymers are the physical combinations of carbon with:

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Oxygen only

Hydrogen

Nitrogen

All of these

None of these

Newton's third law also says that action and reaction forces always act on the

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Different bodies

Same bodies

Only one body

None of these

A cyclist bends while taking a turn to:

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Reduce friction

Generate required centripetal force

Reduce apparent weight

Reduce speed

The effect of decrease in pressure with the increase in speed of the fluid in horizontal pipe is drive from

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Bernoulli's theorem

Venturi effect

Torricelli's theorem

Diastolic effect

Which one of the following groups have quantities that do not have the same dimensions?

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Velocity,speed

Pressure,stress

Force,impulse

Work,energy

The medium in which speed of light is the same in all directions is called:

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Homogeneous

Heterogeneous

Non-homogeneous

Free space

Let a ray of light enters from air into two media of different refractive indices. The speed of light will be ______ to refractive index

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Directly proportional

Inversely proportional

Sometimes inversely

Equal

Force applied on a unit area of a body to produce any change in its shape, Volume or length of a body is called:

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Strain

Stress

Young's modulus

Bulk modulus

Either (C) or (D)

Which of the following lists of physical quantities consists only of vectors:

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Time,temperature,velocity

Force,volume,momentum

Velocity,acceleration,mass

Force,acceleration,velocity

If S is the stress and Y is Young's modulus of the material of a wire, the energy stored in the wire per unit volume is

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2 S²Y

S²/2Y

2Y/S²

S/2Y

When two surface are coated with a lubricant,then they

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Stick to each other

Slide upon each other

Roll upon each other

None of these

A temperature at which the material losses its orderliness is know as

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Ambient temperature

Curie temperature

Highest temperature

None of these

The smallest portion of a crystal lattice that if repeated in three-dimensions will generate the entire lattice is called:

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Unit cell

Lattice plane

Crystal

None of these

Pico is the prefix for

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10^-10

10^-12

10^-15

10^-18

If the vector sum of all the external forces acting on a body is zero, then the body will be in

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rotational equilibrium

translational

complete equilibrium

all of them

Breaking load for units area of cross-section of a wire is called:

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Tensile strength

Ductibility

Yield point

Breaking stress

The dimensions of intensity of energy are

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MLT⁺²⁷T¹

MLT²T²

ML³

MLT^-2T³

Isothermal temperature Isobaric?

Choose an answer

Pressure

Volume

Heat

Entropy

Change in momentum per second is:

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Product force and time

Product of pressure and area

Ratio of pressure and area

None of these

Point out the element having atomic mass = 63.5465:

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Br

Zn

Cu

Ni

Scientific notation which can be expressed in the

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Negative powers

Powers of ten

Decimals

None of these

Two forces of 6 N and 8 N can produce a resultant of

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0 N

1 N

10 N

18 N

An object thrown in arbitrary direction in space with an initial velocity and moving freely under gravity will follow

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a circular path

a straight line

a hyperbola

a parabola

The SI unit of heat is

Choose an answer

calorie

joule

electron volt

None of these

The S.I. unit of angular displacement is

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Degrees

Revolution

Radian

All of them

There are earth stations which transmit signals to satellites and receive signals via satellite from other countries are

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200

Over 200

400

500

A sun rise or sun set the sun looks reddish because

Choose an answer

The sun is coldest at these times

Of the effects of reflection and refraction

The sun is hottest at these times

Of the scattering of light

A stress which is along one dimension is known as:

Choose an answer

Tensile stress

Linear stress

Compressive stress

Both (A) and (C)

Both (A) and (B)

Heat rollers make the copy

Choose an answer

Heated

Tone melted

Dry

All of them

The force of friction that comes into action after the motion has started is called

Choose an answer

Limiting friction

Static friction

Friction

None of these

A thin layer of oil on the surface of water looks colored due to:

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Diffraction of light

Reflection of light

Dispersion of light

Interference effect of light

A train us moving with a velocity of 25 m/s and a car is moving behind it by a velocity of 8 m/s in same direction The relative velocity of train with respect to car is

Choose an answer

17 m/s

33 m/s

17.5 m/s

None

An are equal to radius of the circle subtended an angle of ______ at the center of circle

Choose an answer

1 rad

2 rad

π rad

1/2π rad

Which of the quantity is dimensionless:

Choose an answer

Strain

Stress

Modulus of elasticity

Work

Entorpy

Random error occurs when repeated measurements of the quantity under the same conditions gives

Choose an answer

Equal values

Different values

Increasing values

None of these

Which phenomenon of light conclusively prove that light waves are transverse waves

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Reflection

Diffraction

Interference

Polarization

If moon radius 1600 km and g on its surface is 1.6 ms^-2Then the escape velocity on the moon is

Choose an answer

1600 ms^-1

50.6 ms^-1

50.8 ms^-1

2263 ms^-1

For full wave rectification, the minimum number of diodes used is:

Choose an answer

1

2

3

4

When the velocity of a body is increasing, the acceleration produced is

Choose an answer

No acceleration produced

Negative acceleration

Positive acceleration

None of these

If force of friction is negligible, then acceleration of two free falling objects of different masses is

Choose an answer

The same

Different

Smaller mass has smaller acceleration

None of these

Who confirm the wave theory of light ?

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Newton

Michelson

Newton

Thomos Young

A thermodynamic process in which temperature of system does not change during heating

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Isobaric process

Isobar process

Isothermal process

Adiabatic process

A mental wire is stretched by suspending weight to if x is the longitudinal strain and y is young s modulus of elasticity then the elastic potential energy per unit volume is

Choose an answer

1/2 y x²

x² / 2y

y² / 2x

x² / 2y

The viscosity of red blood cells increase than water is from

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2 to 3 times

3 to 4 time

4 to 5 times

3 to 5 times

When heat is added to the system, the entropy change is:

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Positive

Negative

Zero

None of these

When two objects come to common temperature, the body is said to be in:

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Static equilibrium

Dynamic equilibrium

Thermal equilibrium

None of these

Which of the following is a scalar quantity?

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Displacement

Electric field

Acceleration

Work

Wavelength of X-rays falling at glace angle 30° on crystal with atomic spacing 2 x 10^-9m for the first order diffraction is

Choose an answer

4 x 10^-6m

2 x 10^-10m

0.2 x 10^-10m

20 x 10^-10m

If λ = 589 nm d=1.0 mm L=225 cm then fringe spacing ΔY is given by

Choose an answer

1.76 mm

1.80 mm

1.37 mm

1.33 mm

The curie temperature of iron is called

Choose an answer

250°C

500°C

750°C

1000°C

The value of Faraday number is SI unit is

Choose an answer

9.65 Coulomb/kg/equivalent

9.65 x 10⁷Coulomb/kg/equivalent

9.65 x 10^-7Coulomb/kg/equivalent

9.65 Coulomb/kg/equivalent

The weight of 10 kg body falling freely is

Choose an answer

zero

98 N

9.8 N

10 N

The horizontal range of projectile, at a certain place, depends upon

Choose an answer

the mass of the projectile

velocity of projection

angle of projection

angel as well as velocity of projection

Charge to mass ratio (e/m) of a charge particle is also called its:

Choose an answer

Specific charge

Specific Force

Gyro-magnetic ratio

Magneto-mechanical ratio

Close orbiting satellites orbit the Earth at a height of about

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500 km

400 km

300 km

800 km

The speed of commercial jet (air liner) is

Choose an answer

200 ms^-1

267 ms^-1

327 ms^-1

335 ms^-1

Aquifier is a layer of rock holding water that allows water to percolate through it with

Choose an answer

Temperature

Pressure

Steams

None of these

The most common method to obtain plane polarized light by using dichoric substance is:

Choose an answer

Selective absorption

Reflection from different surfaces

Refraction from different surfaces

Scattering

The maximum stress that a body can tolerate is called

Choose an answer

UTS

Permanent stress

Elastic strength

Plastic stress

At high speed and for long trajectories the air friction is

Choose an answer

Negligible

Not negligible

More than gravity

None of these

Hooks law hols within

Choose an answer

Proportional limit

Elastic limit

Plastic limit

None

During the projectile motion, the vertical component of velocity

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changes with time

becomes zero

becomes maximum

all of them

The spectrum of a star’s light is measured and the wavelength of one of the lines as thesodium’s line is found to be 589 nm. The same line has the wavelength of 497 nm whenobserved in the laboratory. This means the star is

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Moving away from the earth

Moving towards the earth

Stationary

Revolving around the planet

The rate at a which the angular displacement is changing with time is called

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Angular acceleration

Angular velocity

Average angular velocity

None of these

A ball of mass m moving with uniform speed collides elastically with another stationary ball.The incident ball will lose maximum kinetic energy when mass of the stationary ball is:

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m

2 m

4 m

Infinity

The difference between two separated positions are given as X₁ = 10.5 ± 0.1 cm and X₂ = 26.8 ± 0.1 cm. What is their absolute uncertainty

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1.63 ± 0.1 cm

16.3 ± 0.2 cm

3 ± 0.1 cm

16.3 ± 0.05 cm

Viscosity of ethanol at 30^oC in Nsm^-2

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0.954 × 10^-3

1.000 × 10^-3

1.012 × 10^-3

1.014 × 10^-3

Negative and positive charge in a hollow sphere are equal in the number then flux from the surface will be

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Zero

Positive

Negative

Flux will be both negative and positive

The fractional effect between layers of following fluid is

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Viscosity of fluid

Velocity of fluid

Acceleration of fluid

Pressure of fluid

An n-type semiconductor is obtained by doping germanium or silicon with

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Tetravalent impurity

Trivalent impurity

Pentavalent impurity

Monovalent inpurity

How is the image formed by a convex lens affected if the upper half of the lens is covered with a paper

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The upper half of the image is cut off

The brightness of the image is reduce

The brightness of the image is increased

Lower half of the image is cut off

If d = 0.25 cm Y = 0.059 cm L = 100 cm m = 2 then λ is equal to

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567 nm

569 nm

590 nm

596 nm

Steel is preferred for making springs over copper.Whey?

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Steel is cheaper

Young;s modulus of steel is more than that of copper

Young's modulus of copper is more than that of steel

Steel is less likely to be oxidized.

Monochromatic light directly means waves of

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Same frequency

Same color

Same wavelength

All of them