Question # 1

The speed of sound in air does not depend upon

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Temperature

Pressure

Density

Medium

The SI unit of intensity of light is

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Joule

Mole

Candila

Kilomole

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

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The diameter of a lens is called

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Focal length

Aperture

Principle axis

Centre

A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

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28o J

920 J

600 J

200 J

If amplitude of a simple pendulum is increased by 4 times the time period will be.

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Four times

Half

Same

Two times

The path followed by a projectile in known as its

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Range

Trajectory

Cycle

Height

The orbital angular momentum is associated with the motion of a body along

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Straight path

Circular path

Curved path

Along any path

The product of cross sectional area of a pipe and speed of fluid along the pipe is

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Zero

Maximum

Constant

Variable

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

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Refraction

Polarization

Interference

Diffraction

If the temperature of sink is absolute zero then the efficiency of heat engine engine should be.

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100%

50%

Infinite

zero

Work has dimension lime

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Torque

Momentum

Velocity

Power

How many orbiting satellites from the Global positing system.

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3

12

24

22

A man of mass 5 kg is falling freely, the fore acting on it will be

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5 N

9.8 N

19.6 N

49 N

Minimum number of unequal forces whose vector sum can be zero are.

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5

4

3

2

The angle of projection for which its maximum height and horizontal range are equal

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46 ^o

56^o

66^o

76^o

The terminal velocity can be obtained by using

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Newton's law

Stock's law

Guass's law

None of these

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