Question # 1

The area between velocity time graph and the time axis is numerically equal to.

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?Speed of object

Distance covered by the object

Average velocity of the object

Acceleration of the object.

The formula of centripetal acceleration is

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The resultant of two forces 30 N and 40 N acting parallel to each other is.

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30 N

40 N

70 N

10 N

For 2.450 no. of significant digits.

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2

1

3

4

The term in Bernoulli's equation has the same unit as

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Work

Volume

Pressure

Force

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If the pressure of a gas is doubled, then speed of sound is.

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Doubled

Become half

Not affected

Increases by four times

The diver spins faster when moment of inertia becomes.

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smaller

Greater

Constant

Zero

The energy processes, we use are

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Efficient

Not efficient

Reversible

None of these

The waves used in radar speed trap are

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Longitudinal

Sound wave

Micro waves

Matter waves

The number of significant figure in 8.80 x 10⁶ kg is

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1

3

6

5

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

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7

9.6

11

3.5

If velocity time graph is parallel to time axis, then acceleration of moving body will be.

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Maximum

Positive

Zero

Negative

For working of heat engine, there must be.

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A source

A sink

either of these

Both of these

The SI units of flow rate are.

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m2s-1

m3s-2

m3s-1

m2s-2

Two tunign forks of frequencies 260 Hz and 256 Hz are sounded together , the number of beats per second is.

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2

258

516

4

the wavelength of transverse wave travelling with a speed 'v' having frequency 'f' in equal to

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f/v

Vf

V/f

f/V2

When speed of a body is doubled then its

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K.E. is doubled

P.E. is doubled

Acceleration of doubled

Momentum is doubled

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