Question # 1

Speed of sound in vacuum is

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280 ms-1

332 ms-1

333 ms-1

Zero ms-1

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The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

Second pendulum has a time period

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1 sec

3 sec

2 sec

4 sec

A man weight 1000 N in a stationary lift. If the lift moves up with an acceleration of 10 ms-2. then its weight becomes.

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1000 N

2000 N

3000 N

0 N

The curve representing an adiabatic process is called.

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An adiabatic

An isotherm

Both of these

None of these

If 332 waves pass through a medium in 1 second with speed of 332 ms-1 then wavelength will be

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7 m

332 m

664 m

1 m

The magnification of a convex lens of focal length 5 cm is equal to.

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5

6

10

23

The diver spins faster when moment of inertia becomes.

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smaller

Greater

Constant

Zero

[LT-2] is demensional formula for

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Acceleration

Velocity

Force

Momentum

The magnifying power of a convex lens of focal lendth 10 cm is

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7

9.6

11

3.5

The measure of hotness or coldness of a substance is.

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Temperature

Heat

Internal energy

Energy

Systematic erro occurs due to

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Instrument

Zero erro of the instrument

Botah a and b

None of these

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

The number 64.350 is rounded off as

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64.4

64.46

63.35

64.36

A heat engine operates between the temperature 1000 K and 400 K, Its efficiency is.

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100%

70%

60%

50%

Two tuning forks of frequencies 240 Hz and 243 Hz are sounded together, the number of beats per second is.

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Zero

2

3

4

Half wavelength corresponds to

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0 ^o

90 ^o

180 ^o

360 ^o

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