Question # 1

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

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

Which one of the following is an example of SHM:

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Motion in a plane

Motion in a swing

Motion in a car

None of these

In vibrational motion(SHM)

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P.E remains conserved

Average K.E remain constant

Neither P.E nor K.E remains constant

Total energy remains constant

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 time period of a simple pendulum is independent of its:

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Length

Mass

Value of g

Both A and B

Which of the following quantity for particle executing SHM is non-zero at mean position

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Force

Acceleration

Velocity

Displacement

A particle moving uniformly along circle its projection along diameter performs

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Linear motion

Projectile motion

SHM

Rotatory motion

To and from motion of a body about its mean position is known as:

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Translatory motion

Vibratory motion

Rotatory motion

None of these

The restoring force is always directed towards:

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Rest position

Equilibrium position

Mean position

All of them

Acceleration of body executing SHM is always directed towards

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Extreme position

Mean position

Along the direction of motion

None

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

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

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90°

180°

45°

360°

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

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

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

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

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

Velocity of particle executing SHM will be maximum at

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Extreme position

Mean position

b/w mean and extreme

None

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

The S.I unit of frequency is

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Vibrations s^-2

Ms^-1

Hertz

s^-1

Hertz is unit of:

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Time period

Displacement

Amplitude

Frequency

Amplitude in SHM is equivalent to ______ in circular motion:

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Diameter

Radius

Circumference

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

The maximum distance of body from mean position when body is executing SHM is called

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Time period

Displacement

Amplitude

Frequency

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

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f/2

2f

f

4f

A body with frequency of would complete one vibration in:

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f seconds

1/f seconds

1 second

f²second

Amplitude in SHM is equivalent to ______ in circular motion

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Diameter

Radius

Circumference

None of these

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

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K/2

2 K

4 K

None of these

The string of a simple pendulum should be:

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Heavy

Extensible

In-extensible

None of these

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