Question # 1

A wheel of radius 50 cm having an angular speed of a rad /s have linear speed.

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1.5 m/s

3.5 m/s

2.5 m/s

4.5 m/s

A spring has a spring constant k. If it is cut in two equal parts, the spring constant of each part will be

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K

2 K

K/2

4K

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

The time period of an oscillating mass spring system is 10 second. If mass attached to spring id doubled then time period becomes.

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10 sec

20 sec

5 sec

None of these

Height of projectile is maximum at an angle of.

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45^o

60^o

30^o

90^o

A force of 10 N acts on a body of mass 5 kg in one second. The change in its momentum will be.

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10 kgms-1

50 kg ms-1

2 kg ms-1

20 kg ms-1

If the initial velocity of a projectile becomes doubled, the time of fight will be.

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Same

4 times

Double

3 times

A body starting from rest attains angular acceleration of 5 rad s-2 in 2 second final angular velocity will be.

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10 rad s-1

7 rad s-1

3 rad s-1

2 rad s-1

The work done will be maximum when angle between F and d.

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180^o

0^o

90^o

60^o

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

The drag force increases as the speed of object

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Become zero

Decreases

Increases

Remains constant

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

Wavelength of a wave for closed pipe having length 'l' in the fundamental mode is.

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2 l

1/2

4 l

l

The temperature scale which is independent of nature of substance is.

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Thermodynamic scale

Centigrade scale

Fahrenheit scale

Regnault scale

the height of the geostationary satellite above the equator is.

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35000 km

36000 km

34000 km

33000 km

Apparent weight of a man is in upward accelerated lift will

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Increases

Decreases

Remain same

Increases then decrees

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