Question # 1

The S.I unit of frequency is

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Vibrations s^-2

Ms^-1

Hertz

s^-1

An angle of 180° in circular motion is equivalent to ______ in SHM.

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Half the vibration

One vibration

3/4th of a vibration

None of these

If a mass of 10 gm is suspended from a spring of k = 9.8 Nm^-1, then the extension will be:

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1 cm

1 m

10 mm

None of these

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

SHM is type of ______ motion

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Vibratory

Linear

Circular

None

If a force of 0.05 N produces an elongation of 20 mm in a 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

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

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1 second

2 second

3 second

None of these

The body oscillates due to ______ accelerates and overshoots the rest position due to _____:

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Applied force , inertia

Restoring force, friction

Frictional force, inertia

Restoring force, inertia

When a body is vibrating, the displacement from mean position:

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Increases with time

Decreases with time

Changes with time

None of these

When a body is vibrating, the displacement from mean position

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Increases with time

Decreases with time

Changes with time

None of these

If time period of a pendulum is doubled by increasing its length, then its frequency will

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Also be doubled

Become half

Become one fourth

Becomes four times

If there identical strings each of constant K are hooked together the spring constant of resultant spring will be:

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3 K

2 K

K/4

K/3

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

If a given spring of spring constant k is cut into two indentical segments, the spring constant of each segment is:

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k/2

2 k

4 k

None of these

A particle is moving along a circular path with uniform speed. Its projection will execute____along the____of the circle:

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Circular motion, circumference

Vibrator, chord

SHM, diameter

SHM, circumference

When quarter of a circle is completed, phase of vibration is:

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90°

180°

45°

360°

The SI unit of spring constant is identical with that of:

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Force

Surface tension

Pressure

Loudness

Vibratory motion is always under

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Applied force

Restoring force

Periodic force

Gravitational force

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

The number of vibrations in two seconds can be expressed as______if frequency of vibration is f.

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f

2 f

3 f

1/2 f

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

The unit of spring constant is:

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J-sec

Metre

Nm^-1

None of these

A body with frequency would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

The graph showing the variation of displacement with time is a

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Sine curve

Straight line

Parabola

None of these

The restoring force is ______ and opposite tot he applied force within ______

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Equal, Elastic limit

Different, The walls of the laboratory

Different, Elastic limit

None of these

An oscillating body oscillates due to:

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Applied force

Restoring force

Frictional force

None of these

Amplitude in SHM is equivalent to_____ in circular motion:

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Diameter

Radius

Circumference

None of these

A body of mass 0.031 kg attached to one end of a spring of spring constant 0.3 N/m, then time period of spring mass system will be:

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1.5 sec

2.0 sec

2.3 sec

2.5 sec

The time period of a simple pendulum is independent of its:

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Length

Mass

Value of g

Both A and B

Amplitude in SHM is equivalent to ______ in circular motion

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Diameter

Radius

Circumference

None of these

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