Question # 1

In the formulaα_amino= 1.22λ/D, D denotes

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Distance between source and the object

Diameter of lens

Power of the lens in Diopters

None of these

When light travels from one medium to another which are separated by a sharp boundary the characteristic which does not change is

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Velocity

Wavelength

Frequency

Amplitude

The structure of the polymeric solid is:

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An ordered structure

A disordered structure

Intermediate between order or disorder

Any of these

None of these

The escape velocity of a body depends upon

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The mass of the body

The mass of the planet

Volume of body

Density of body

Every streamline can

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Not cross each other

Cross each other

Some what cross each other

None of these

The dimensional formula of gravitational constant G is:

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MLT^-2

ML³T^-2

M^-1L³T^-2

M^-1LT^-2

A we go from the equator to the poles, the value of weight

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Remains the same

Increases

Decreases

Decreases up to a latitude of 45°

The typical speed of Moon around the Earth is

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1000 ms^-1

2000 ms^-1

3000 ms^-1

4000 ms^-1

Capacitor can be charged by transferring

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Negative charge

Positive charge

Both

None them

The sky appears blue because

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Red light is absorbed

Blue light is scattered the most

Blue light is absorbed

It is its natural color

A non-inverting amplifier has infinite input resistance then the voltage gain of noninverting amplifier will be:

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Zero

Infinite

One

100

Suppose the water flows out from a pipe at 3 kg s^-1and its velocity changes from 5m s^-1to zero on striking the wall, the force exerted by water on wall will be

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5 N

10 N

15 N

20 N

If they donot have a = 9.8 ms^-2 they would fly

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In the same orbit

Off in a straight the tangent to Earth

Leaving the present orbit

None of these

Which of the following gives three regions of the electromagnetic spectrum in order of increasing wavelength?

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Gamma rays,microwaves,visible radiation

Ultraviolet infra-red microwaves

Radio waves ultraviolet X-rays

Visible radiation gamma rays radio waves

Hails fall faster than rain drops due to their

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Greater size

Greater mass

Greater area

None of these

In case of linear deformation, the ratio of the tensile stress to the tensile strain is called

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Young's modulus

Bulk modulus

shear modulus

all of them

At 0k whihc of the following properties of a gas wiil be zero?

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Kinetic energy

Potential Energy

Vibrational Energy

Density

In Young's double slit experiment, the widths of dark and bright fringes are

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different

equal

zero

variable

Electrical activity of the retina the eye, generates which is used in electro ethnography as

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Current

Voltage

Resistance

None of these

A 50 kg man with 20 kg load on his head climbs up 20 steps of 0.25 m height each.The work done in climbing is

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5 J

350 J

100 J

3430 J

When a body moves with increasing acceleration, its velocity-time graph is a

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straight line

horizontal straight line

vertical straight line

curve

The rotational analogue of mass in linear motion is

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Torque

Angular momentum

Moment of inertia

Weight

The temperature below which materials are superconductor is called as:

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Kelvin temperature

Critical temperature

Curie temperature

none of these

How many types of the optical fibres are

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One

Two

Three

Four

A stress which is along one dimension is known as:

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Tensile stress

Linear stress

Compressive stress

Both (A) and (C)

Both (A) and (B)

A typical diffraction grating has lines per centimeter is about

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500 to 6000

400 to 5000

450 to 5500

425 to 5670

An electric field can deflect

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Neutrons

X-Rays

γ-Rays

α-Rays

Gaussian surface may be

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Spherical

Rectangular

Any shape

None of these

Rain drops are spherical because of

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Gravitational force

Surface tension

Low viscosity of water

Air resistance

The value of Faraday number is SI unit is

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9.65 Coulomb/kg/equivalent

9.65 x 10⁷Coulomb/kg/equivalent

9.65 x 10^-7Coulomb/kg/equivalent

9.65 Coulomb/kg/equivalent

The product of force and time of impact force is called

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Momentum

Impulsive force

Impulse

Rate of change of momentum

The dimensions of ½at²are of

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length

Velocity

Acceleration

TIme

Thermal and mechanical equilibrium is maintained all the time so that each process is

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Reversible

Perfectly reversible

Irreversible

None of these

For assessment of total uncertainty when added or subtracted the absolute uncertainties are

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Multiplied

Divided

Added

Subtracted

The waves propagate in space by the motion of the

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wavelengths

frequencies

wavefronts

none of them

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 error of any measurement may occur due to

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Negligence

Faulty apparatus

Inappropriate method

All of these

In an astronomical telescope is the objective has the focal length f_o is

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Small

Very small

Long

None of these

What type of science is Physics

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Living things

Non-living things

Experimental science

None of these

In the following velocity time graph,the distance traveled by the body in meters is

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200

250

300

400

Which of the following cannot have an effect on the weight of an object?

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The distance of the object from a planet

The acceleration of the object

The placement of the object on a different planet

The mass of the object

In light waves, the components of electric and magnetic fields are

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parallel to each other

anti-parallel to each

right angle to each other

none of them

Finger prints on paper are identified by sprinkling fluorescent powder on it and observing it under

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Sun light

Sodium light

Infrared

UV

The particles equal in mass or greater than mass of protons are called:

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Leptons

Mesons

Baryons

Quarks

The information received at the other end of a fibre can be inaccurate due to

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dispersion of light signal

spreading of light signal

both of them

none of them

An are equal to half of the radius subtend angle of ________ at the center of circle.

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.π rad

2π rad

1/2π rad

1/2 rad

The value of universal gas constant R is:

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8.314 J/K mole K

8314 J/ mole K

8.314 J/ mole K

None of these

When the object lies between F and 2F the image formed by a convex lens is

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Real

Virtual

Diminished

Erect

Which one is ferromagnetic

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Ferries

Cobalt

Nickel

All

The ratio of the numerical values of the average velocity and average speed of a body is always.

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Unity

Unity or less

Unity or more

Less than unity

Insulators are those material in which energy gap is

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very large (several eV)

very narrow (= 1ev)

either of them

none of them

A human eye can detect the electromagnetic radiations of the type:

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Infrared radiations

For- infrared radiations

X-rays radiations

Red radiations

The speed of flow of fluid in laminar flow is

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Low

High

Very high

Some time high some time low

Beta particles have penetration of about:

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100 times more than that of the gamma particles

100 times less than that of an alpha ray

100 times more than that of an alpha ray

10 times more than that of an alpha particle

Which one is not correct representation?

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5N

3 Newton

5 Newton

both a and b

SI unit of angular moment is

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Kgms^-1

Kgm²s^-2

Kgm²s^-1

Kgm³s^-1

If one of the rectangular components of a vector is not zero, can its magnitude be zero

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It is zero

It if not zero

It may be negative

None of these

For the angle of projection of a projectile for which its maximum height and horizontal range are equal

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50^o

45^o

60^o

76^o

When a silicon crystal is doped with a trivalent element, then the atom of the trivalent element is known as

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acceptor

donor

either of them

none of them

The SI unit of heat is:

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Calorie

Horse power

Joule

Watt

If the resultant of n forces of different magnitudes acting at a point is zero, then the minimum value of n is

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1

2

3

4

The size of the molecules in comparison with the separation between the molecules is

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Small

Very small

Extremely small

None of these

The mass of Uranium atom is

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10^-10 Kg

10^-15 Kg

10^-20 Kg

10^-25 Kg

The ratio of shearing stress/shearing strain is called as

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modulus

Pascal modulus

Hooke's modulus

shear modulus

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

The young s modulus of a wire of length L and radius r is Y if the length is reduced to L/2 and radius to r/2 its young s modulus wire be

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Y / 2

Y

2 Y

4 Y

When a silicon crystal is doped with a pentavalent element, then the atom of the pentavalent element is known as

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acceptor

donor

either of them

none of them

Viscus force depends upon

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Coefficient of viscosity

Velocity of objects

Radius of object

All of these

Electric potential of earth is taken to be because earth is a good

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insulator

Conductor

Semi-conductor

Dielectric

A typical rocket consists of fuel

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more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

The ultimate tensile strength of the material can be regarded as

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Maximum strength

Nominal strength

No strength

None of these

The atom or molecules in crystalline solids are held together by:

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Cohesive force

Adhesive force

Gravitational force

Magnetic forces

A particle is moving along a circular path of radius 5 m with uniform speed 5 m/sec what will be the magnitude of centripetal acceleration when the particle completes half revolution

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10π m/sec²

5 m/sec²

10/π m/sec²

Zero

The work done in placing a charge of 8 x 10^-18C on a condenser of capacity 100 μ F is

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32 x 10^-32 j

16 x 10^-32j

3.1 x 10^-26j

4 x 10^-10j

Light appears to travel in straight line because

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It is not absorbed by the atmosphere

It is refracted by the atmosphere

Its wavelength is very small

Its velocity is very large

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

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a rocket

an aeroplane

a projectile

a balloon

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

Interference and diffraction confirm:

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Particle nature

Wave nature

Dual nature

None of these

The original source of geothermal energy is

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Biomass

Fossil fuels

Moon

Earth

The terminal velocity of for a water droplet of radius 10^-5 m is of the order of

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1 cm/s

1 mm/s

1 nm/s

1 μm/s

Ratio of dimensions of power and K.E is

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1 : 1

T : 1

1 : T

M : T

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

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44%

55%

66%

77%

After elastic limit the shape of graph is

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Curved

Straight Line

Saw tooth

Arbitrary

A unit vector may be defined by the

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Surface

Direction by normal drawn vector

Along the direction of surface

a and b

A steam turbine plant has boiler 427 C° and exhausts at 77°C what is the maximum possible efficiency

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60%

70%

50%

40%

In case of interference fringes:

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Energy is destroyed at dark

Energy is created at bright fringes

Energy is transferred from dark to bright ringes

None of these

A particle of mass 0.5 g moving along x-axis is located at x₁= 15 m at t₁=5 s and x₂=33 m at t₂=13 s. Its average velocity is

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6 m s^-1

2.45 m s^-1

2.25 m s^-1

4.45 m s^-1

The rotational analogue of Newtons second law of motion is

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mr²α

mrα

mrα²

None of these

Venturi meter measures

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Fluid density

Rate of flow of fluid

Speed of fluid

All

In a semiconductor,the mobility of holes is

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Greater then electrons

Less than electrons

Equal to electrons

None

A charged oil drop is suspended in a uniform field of 3 x 10⁴ V/m so that it neither falls nor rises.The charge on the drop will be (Mass of charge = 9.9 x 10^-15 kg and g = 10 m/s²)

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1.6 x 10^-18C

3.2 x 10^-18C

3.3 x 10^-18C

4.8 x 10^-18C

Ordinary light has components of vibrations in

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one direction only

two directions

four directions

all directions

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

The bright fringes are termed as

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minimum

maximum

bright spots

dark spots

A hole is drilled half-way to the centre of earth. A body weighs 200 N on surface of earth. How much will it weigh at bottom of the hole

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100 N

150 N

200 N

250 N

The dimensions of intensity of energy are

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MLT⁺²⁷T¹

MLT²T²

ML³

MLT^-2T³

A lens of 2 cm focal length is to be used as a magnifying glass. Its magnification is

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13.5

12.5

0.5

2.5

Zero order image formed by the grating when the angle the along the direction of normal to grating is

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Zero

90^o

180^o

None of these

Huygen's principle states that:

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Light travels in straight line

Light has dual nature

Either of these

None of these

Under same environment the measurement of a physical quantity gives different values. The error in measurement is called

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Random error

Systematic error

Physical error

Uncertainty

A cane filled with water is revolved in a vertical circle of radius 4 m and water just not fall down The time period of revolution will be nearly

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1 s

4 s

8 s

10 s

The more general form of second law of motion is

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F = ma

F x t = mV_f- mV_i

Both

None of these

An object moving with acceleration g is said to fall freely identify freely falling objects from the list given below

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An orange falling from a tree

A satellite orbiting around the earth

A football kicked in the air

All of these

Resistance of 60 watt bulbs in 120V line is:

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20 ohms

240 ohms

0.15 ohms

180 ohms

The magnetic field produced due to circulating currents. The idea was first given by

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Faraday

Ampere

Lenz

None of these

Bernoulli's equation related to pressure, fluid speed and height which is

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An important equation

Principal equation

Fundamental equation

None of these

Period of audible sound waves is

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1 × 10^-4 sec

1 × 10^-3 sec

1 × 10^-2 sec

1 × 10^-1 sec

The appearance of colours in the shape (or oil) film results from:

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Dispersion

Interference

Reflection

Refraction

Who discovered the inverse square law of gravity

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Einstein

Newton

Compton

Fermi

The theory which explains the vast diversity in an electrical behaviour of all types the materials is

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Free electron theory

Band theory

Theory based as chemical properties

None of these

Two wires of same material have lengths L and 2L and cross-sectional area 4A and A respectively. the ratio of their specific resistance would be:

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1: 1

1: 8

8: 1

1: 2

If it is assumed that a frictional force f is present, during the downward motion their

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mgh - f = 1/2 mV²

2mgh - f = 1/2 mV²

mgh - f = 1/2 mV²

None of these

If rope of lift breaks suddenly,The tension exerted by the surface of lift is (a = Acceleration of lift)

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mg

m (g + a)

m (g - a)

0

Fraunhofer's lines commonly visible in the sun's spectrum are examples of

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Line emission spectrum

Line absorption spectrum

Band emission spectrum

Band absorption spectrum

In an ideal gas, the molecules have:

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Kinetic energy only

Potential energy only

Both KE and PE

None of these

If a metallic bob is suspended by a string in the vertical place, it will be in?

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complete equilibrium

translational equilibrium

rotational equilibrium

none of them

The speed of running cheetah is

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15 ms^-1

23 ms^-1

26 ms^-1

29 ms^-1

An electric room radiator, which operates at 50V has resistance of 50 Ω. Power of the radiator is approximately:

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100W

50W

450W

1000W

The decrease in velocity per unit time is called

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deceleration

acceleration

uniform acceleration

variable acceleration

Unit of universal gas constant is SI is:

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W K^-1 mol^-1

J/Nk^-1 mol^-1

Jk^-1 mol^-1

erg K^-1 mol^-1

Deceleration means the speed of the body is

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Increasing

Decreasing

Just moving

None of these

If the mass and radius of a planet are doubled, then acceleration due to gravity on its surface will become

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One fourth

One half

Double

Four times

The percentage uncertainty in measuring the volume of sphere measured by calipers callipers is when r = 2.25 ± 0.01 cm with least count ± 0.01 cm

Choose an answer

46.7 ± 0.5 cm²

47.7 ± 0.5 cm³

47.7 ± 0.6 cm³

477.6 ± 0.6 cm³

The rectangular components of force 5 dyne are

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3 and 4 dyne

2.5 and 25 dyne

1 and 2 dyne

2 and 3 dyne

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

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The same

Different

Smaller mass has smaller acceleration

None of these

Carnot cycle is:

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Reversible

Irreversible

Sometimes A, Sometimes B

None of these

Two equal, antiparallel and non-collinear forces are called

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Net force

Couple

Torque

None of these

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

Force due to water flow in which the water of mass 'm' strikes the wall in time 't' then force F on the water is

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The power output of a full wave rectifier is:

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Equal to H.W.R

Twice of H.W.R

Half of H.W.R

Four times of H.W.R

On heating, it becomes a very viscous liquid at almost

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500 C^o

800 C^o

900 C^o

1000 C^o

The critical temperature of mercury is

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1.18 K

4.2 K

3.72 K

7.2 K

Polythene,polystyrene and nylon are example of

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Polymeric solids

Crystalline solids

Glassy solids

For a circular orbit, the satellite has speed of

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20,000 kmh^-1

25,000 kmh^-1

26,000 kmh^-1

27,000 kmh^-1

Davisson and Germer received the Nobel prize for their work on:

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Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

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

The ratio of electro static force to the gravitational force between them is of the order of

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10³⁶

10³⁸

10⁴⁰

10⁴²

Light waves are:

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Transverse waves

Longitudinal waves

Compressional waves

None of them

Two particles of equal masses are revolving in circular paths of radii r₁ and r₂respectively with the same speed The ratio of their centripetal force

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r₂/r₁

√(r₂/r₁)

(r₂/r₁)

(r₂/r₁)²

A bullet is shot from a rifle.As a result the rifle recoils The kinetic energy of rifle as compared to that of bullet is

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Less

Greater

Equal

Cannot be concluded

A process which is carried at constant temperature and Boyle's law can be applied is called:

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Adiabatic process

Isothermal process

Isochoric process

None of these

The speed of commercial jet (air liner) is

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200 ms^-1

267 ms^-1

327 ms^-1

335 ms^-1

In newton's rings apparatus, we also use:

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Spectroscope

Telescope

Microscope

Any of these

Geometrical optics cannot give following characteristics for a microscope

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Image position

Image size

Resolution of image

Any of the above

Solids which have no regular atomic structure are called

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Crystalline solid

elastic solid

Glassy solid

All of these

The unit of thermodynamic temperature scale is.

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Kelvin

Celsius

Fahrenheit

None of these

The burnt gas expelled from the rocket engine with

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High velocity

Extremely high velocity

Very high velocity

None of these

Selenium is an

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Insulator

Conductor

Semiconductor

Photo conductor

In an inertial frame of reference the weight of body equal to

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Force of attraction

Coulomb's force

Force of gravity

All of these

When torque acting on a system is zero which of the following is constant

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Force

Impulse

Angular momentum

Inertia

The S.I. unit of angular displacement is

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Degrees

Revolution

Radian

All of them

If the angle of refraction is 90^o, for which the angle of incidence is called

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Incident angle

Critical angle

Angle of emergence

None of these

Polymers are the physical combinations of carbon with:

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Oxygen only

Hydrogen

Nitrogen

All of these

None of these

Newtons first law of motion is also known as

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Law of motion

Law of mechanics

Law of inertia

None of these

The work done in an equipotential surface is

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Maximum

Infinite

Zero

None of these

Stress may cause a change in:

Choose an answer

Length

Volume

Shape

Any of these

None of these

The dimensions of velocity are

Choose an answer

[ LT ]

[ LT²]

[ LT^-1]

[ LT^-2]

An optical fibre with its protective case may be typically 6.0 mm in diameter and yet it can replace bundle of copper of diameter

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6.79 cm

6.95 cm

7.52 cm

7.62 cm

A body of mass 100 g is rotating in a circular path of radius r cm with constant velocity.The work done in one complete revolution is

Choose an answer

100 rJ

(r/100)J

(100/r)J

Zero

At the point of contact of the lens and the glass plate, the incident and reflected rays interfere

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constructively

destructively

either of them

none of them

The emf of a cell of negligible internal resistance is 2V. It is connected to the series combination of 𝟐𝛀, 𝟑𝛀 𝐚𝐧𝐝 𝟓𝛀 resistance. The potential difference across 𝟑𝛀 resistance will be in volt:

Choose an answer

0.6

2/3

3

6

The dimensional formula of angular velocity is:

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M^°L^°T^-1

MLT^-1

M^°L^°T^-1

If both the length and radius of the wire are doubled,how does the modulus of elasticity change?

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Becomes one fourth

Halved

Doubled

Remains unchanged

The internal energy of a gram mole of an ideal gas depends upon

Choose an answer

Pressure alone

Volume alone

Temperature alone

Both pressure and temperature

The SI unit of stress is some as that of:

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Pressure

Momentum

Impulse

Change momentum

Force

The compound having highest %age of oxygen is:

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CH₃COOH

C₂H₅OH

H₂O

CH3COCH₃

The magnitude of the displacement is a line from initial position to final position which is

Choose an answer

straight

curved

either straight or curved

none of them

Energy stored in a capacitor is

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E = 1/2 C²V²

E = 1/2 C^-1V²

E = 1/2 CV²

E = C²V²

An ordinary glass gradually softens into a paste-like state before it becomes a very viscous liquid. It happens almost at:

Choose an answer

800°C

500°C

300°C

100°C

None of these

The relation Cp > Cv by an amount equal to

Choose an answer

Gas constant

Universal gas constant

Both

None of these

For a quantity to be a vector it must has/have

Choose an answer

Magnitude and direction

Obey law of vector addition

Both (a) and (b)

Only (a)

The time taken by the light to travel from Pluto to Earth is

Choose an answer

4 hrs 20 sec

5 hrs 20 sec

6 hrs 20 sec

76 hrs 20 sec

A pair of forces equal in magnitude and opposite in direction with non-coincident lines of action is known as

Choose an answer

A couple

A moment of force

A null vector

All of these

How many types of strain is

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1

2

3

4

As we go above the surface of earth the value of 'g'

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Increase

Remain Constant

Decrease

Increase slightly

Which of the following phenomenon is not application of Bernoulli s equation

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Swing in cricket ball

Flying of airplane

Working of carbonator

Beats

The viscous force on a small sphere moving in fluid at high speed v is proportional to

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v²

v

1/v

1/v²

All points on a rigid body rotating about a fixed axis have

Choose an answer

Same angular displacement

Same angular acceleration

Donot have angular speed

None of these

The actual efficiency of properly tuned engine is usually not more than

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20% to 35%

25% to 30%

25% to 40%

None of these

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

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Reflection

Diffraction

Interference

Polarization

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

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

Choose an answer

Y = (m + 1)λL/d

Y = mλL/d

Y = (m + 1/2)λL/d

None of these

The amplitude of oscillation of each atom in a metallic crystal rises with the

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rise in temperature

decrease in temperature

even temperature remains constant

all of them

The electrons in the outermost shell of an atom are called

Choose an answer

Valence electrons

Tightly bound electrons

Free electrons

None of these

The energy of molecular motion appears in the form of

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Friction

Heat

Viscosity

Potential energy

Angle between ray of light and the corresponding wave front is

Choose an answer

10°

60°

90°

120°

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

Choose an answer

8 J

16 J

4 x 10^-3 J

2 x 10^-3 J

No body begins to move or comes to rest of itself said by

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Thomos Young

Abu Ali Sena

Newton

None of these

To produce same acceleration in the bodies of masses 10 kg and 20 kg the force applied in the second body should be

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Halved

Equal for both bodies

Doubled

Three times

Maximum height of a bullet when fired at 30° with horizontal is 11 m.Then height when it is fired at 60° is

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22 m

6 m

33 m

7.8 m

For average velocity of a body, it has

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Straight path

Curved path

Steady motion or variable

All of them

Which of the given strains can also be written as tan θ

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Compressional strain

Volumetric strain

Shear strain

All of these

Can a vector have a component greater than the vectors magnitude ?

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yes

No

yes in some cases

None of these

The magnitude of work is zero when the angle between force and displacement is

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0^o

90^o

10^o

None of these

A gas which strictly obeys the gas laws under all conditions of temperatures and pressure is called:

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Ideal gas

Inert gas

Real gas

None of these

Color printing uses just ______ colors

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Seven

five

three

four

The frame of reference in which Newton's first law of motion holds is known as

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non-inertial frame is known as

inertial frame of reference

both of them

neither of them

The rate of change of angular momentum is

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The applied force

The moment of inertia

The applied torque

Impulse

The precision of measurement in physics depends

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Average values

Least count of instrument

Error free instrument

b and c

In YDS experiment, data given isλ=500 nm, d=1 mm, L=100cm,∆y come out to be:

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0.5 cm

0.5 mm

0.5 nm

0.5 m

As the object is brought from a far off point to he focus, the magnification goes on

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Increasing

Decreasing

Do not change

None of these