Question # 1

If base of a right angle triangle is 3 cm and perpendicular is 4 cm. What is length of perpndicular?

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3 cm

2 cm

5 cm

10 cm

Which pair of physical quantities has same SI unit?

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energy , power

power , work

energy , work

work , momentum

What flower is known as natural thermometer?

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Rose

Barasicca

Crocus

Tulip

If the direction of motion of the force is perpendicular to the direction of motion of the body, then work done will be

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Maximum

Minimum

Zero

None of these

hp stands for :

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1w

Horse power

Joule

All are true

Co-efficient of friction between wood and concrete.

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0.63

0.8

1

0.9

Which types of friction is minimum?

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Sliding

Limiting

Rolling

None

The amount of heat absorb by body depends on the :

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Colour of the surface

Nature of surface

Texture of surface

Both A and B

Independent quantities are taken on

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- x - axis

x -axis

-y-axis

y-axis

Amount of heat that flows in unit time is called:

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Rate of flow of heat

Q/t

Conductivity

Both A and B

The mass of a body is 1 kg, its mass in deep space is :

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1 Kg

0.5 Kg

0.25 kg

0

Electric field lines:

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always cross each other

never cross each other

cross each other inthe region of strong field

cross each other in the region of weak field

Mathematical formula of spring constant is:

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F/x

X/F

F/t

F/m

What is the power rating of a lamp connected to a 12 v source when it carries 2.5 A?

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4.8 W

14.5 W

30 W

60 W

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

The shape of magnetic lines of force in case of a straight current carrying conductor is:

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Eliptical

Trangular

Rectangular

Circular

When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90° is called:

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Angle of incidence

Critical angle

Angle of refraction

Angle of deviation

Hard disk is made of:

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Aluminium

Copper

Iron

Plastic

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power:

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Remains unchanged

Halves

Doubles

Four time

The ray of the light after reflection from concave mirror passes through:

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Centre

Principal focus

Pole

None of these

The value of acceleration is simple harmonic motion at mean position is:

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Maximum

Zero

10 N

Both a and b

The cathode ray oscilloscope consists of main parts:

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Two

Three

Four

Five

Centripetal force perform

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Maximum work

Minimum work

Negative work

No work

The law of conservation of mass gives.

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Beronoulli's

Venturi relation

Torricelli's theorem

Equation of continuity

The numer of significant figureswith the increases accracy of the measuring instrument

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Decreases

Remains unchanged

Increasees

None of these

Light year is the unit of

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Distance

Time

Light

Velocity

At which of the following temperature a body has maximum internal energy.

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-273 ^oC

0 K

273 K

-273 K

Which one of the followign scientistis made some conributions to geometrical optics

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Plato

Archimedes

Euclid

None of these

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

Bending of light around the edges of an obstacle is called.

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Refraction

Polarization

Interference

Diffraction

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

Compton's effect is associated with

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gamma rays

Beta rays

X rays

Positive rays

Which one pair belongs to acceptor impurity.

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Aresincl, phosphorus

Boron, gallium

Arsenic, antimony

Antimony, indium

The unit of permiability of free space is:

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T.m/A

T.m²/A

T.m/A²

None of these

Conversation of only one half of A.C. into D.C. is called.

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Half wave amplification

Wave amplification

Half wave electrification

Half wave rectification

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

Tolerance of "Gold" band.

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±10%

±5%

±15%

±20%

Closeness of the electric field lines is the measure of.

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Direction of field

Strength of field

Potential difference

Uniformity of field

Laser is a device which can produce:

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Intense beam of light

Coherant beam of light

Monochromatic beam of light

All of the above

The induced emf in a coil is proportional to:

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Magnetic flux through the coil

Rate of change of Magnetic flux through the coil

Area of the coil

Product of magnetic flux flux and area of the coil

During each cycle A.C. voltage reaches a peak value.

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Once

Twice

Thrice

Four time

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these