Question # 1

If mass of 10 gm is suspended from a spring of K=0.8 Nm^-1then the extension will be:

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10 cm

1 m

10 mn

None of these

A spring of constant k = 0.4 N m^-1is to be extended through 10 cm at a place where g = 10 m sec^-2. The mass to be suspended should be:

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4 gms

0.4 gm

40 gms

None of these

An object in SHM will have maximum speed when its displacement from equilibrium position is:

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Infinity

Maximum

Zero

Minimum

The acceleration of body executing SHM is directly proportional to

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Applied force

Amplitude

Displacement

Frictional force

A particle executes SHM with frequency. The frequency with which its K.E oscillates is

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f/2

2f

f

4f

If the waves produced in a microwave oven are of wave-length 12 cm, then their frequency will be:

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2500 MHz

0.25 MHz

2500 KHz

None of these

A body with frequency of would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

Second's pendulum is the pendulum whose time period is:

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1 second

2 second

3 second

None of these

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

In SHM, there is always a constant ratio between displacement if body and its:

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Velocity

Period

Mass

Acceleration

The displacement of body executing SHM is

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x_ocoswt

x_osinwt

x_osin²wt

Both A, B

Free oscillations are always produced by:

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An applied force

Gravitational force

Restoring force and inertia

Inertia only

Amplitude is the displacement of the vibrating body from:

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One extreme position to the other extreme position

Mean position any one extreme position

Both A and B are correct

None of these

Hertz is unit of:

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Time period

Displacement

Amplitude

Frequency

If a force of 0.05 N produces an elongation of 20 mm in string, then its spring constant will be:

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250 N m^-1

25 N m^-1

2.5 N m^-1

None of these

An object undergoes SHM. Its maximum equilibrium positions:

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Maximum

Half of its maximum value

Zero

None

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