Displacement of the body in S.H.M is equal to amplitude when body is at

1. mean position

2.else where

3.extreme position

4.none

Electrical resonance is observed in

1.radio

2.microwave oven

3.both in radio and microwave oven

4. neither in radio nor in microwave oven

For a simple pendulum the restoring force is caused by

1.gravity

2.spring

3.hand

4.all of these

In case of a simple pendulum the cause of damping is

1.drag force of air

2.gravity

3.tension in string

4.none of these

Natural frequency of simple pendulum depends upon

1.its mass

2.its length

3.square of its length

4.square root of its length

The projection of the particle moving in a circle with non-uniform speed executes.

1.S.H.M

2.Vibratory motion

3.Both (b) and (d)

4.None S.H.M

The SI unit of force constant is identical with that of

1.force

2.pressure

3.surface tension

4.loudness

When the amplitude of a wave become double its energy become

1.double

2.four times

3.one half

4.none time

A cup of milk is placed in a microwave oven. Tell which statements is false (1) Milk will be heated up only (2) Cup will remain cool (3) Both cup and mild will get hot.

1.both

2.1

3.2

4.3

Forced vibration are known as

1.simple harmonic vibration

2.natural vibration

3.driven harmonic vibration

4.free vibration

If length of second pendulum becomes four times then its time period will become

1.four times

2.six times

3.eight times

4.two times

In vibratory motion

1.P.E. remains constant

2.K.E. remain constant

3.total energy remain constant

4.total momentum remain constant

The length of second pendulum is

1.100 cm

2.99 cm

3.99.2 cm

4.98 cm

The product of frequency and time period is equal to

1.1

2.2

3.3

4.4

Total energy of a body executing S.H.M is directly proportional to

1.square root of amplitude

2.the amplitude

3.reciprocal of amplitude

4.square of amplitude

A simple pendulum suspended form the ceiling of a lift has time period T when the lift is at rest. When the lift falls freely the time period is

1.infinite

2.T/g

3.zero

4.g/T

At Murree Hills (Assume value of g changes). If we use a simple pendulum as time standard then one second duration will.

1.increase

2.decrease

3.remains same

4.is zero

For what displacement the P.E becomes 1/4 of its maximum value?

1.x = x?

2.x = x?/2

3.x = x?/4

4.x = x?2/2

In damped harmonic oscillation which one decreases?

1.amplitude of vibration

2.energy of vibration

3.both amplitude and energy

4.neither amplitude nor energy

In S.H.M. the velocity of a particle is maximum at

1.mean position

2.extreme position

3.middle between mean and extreme position on the right side

4.middle between mean and extreme position on the left side

Mass attached to a spring executes.

1.vibratory motion

2.rotatory motion

3.S.H.M

4. both (a) and c

Phase of SHM describes

1.displacement only

2.direction of motion only

3.both displacement and direction of motion

4.neither displacement nor direction of motion

S.I unit of frequency is

1.vibration S-2

2.radian

3.hertz

4.ms-1

Sharpness of resonance is

1.directly proportional to damping force

2.inversely proportional to damping force

3.equal to square of damping force

4.equal to square of damping force

The acceleration of a projection on the diameter for a particle moving along a circle is

1.w2x

2.wx2

3.w2x

4.wx2

The displacement of SHM is written as X = X? sin?t if displacement is written by X = X? son ?t then phase constant will be equal to

1.0?

2.45?

3.90?

4.180?

The distance covered by a body in one complete vibration is 20cm. What is the amplitude of body

1.10 cm

2.5 cm

3.15 cm

4.7.5 cm

The energy absorbed by a body is ________________ at resonance.

1.maximum as well minimum

2.minimum only

3.maximum only

4.zero

The energy of SHM is maximum at

1.mean position

2.extreme position

3.in between mean and extreme

4.all positions during SHM

The force responsible for the vibratory motion of the simple pendulum is

1. mg cos?

2. mg sin?

3.mg ton?

4.mg

The frequency of the second pendulum is

1.1 hertz

2.0.5 hertz

3. 1.5 hertz

4.2.5 hertz

The restoring force acting on simple pendulum is given by

1.mg sin ?

2.mg sin ?

3.mg cos ?

4.mg cos ?

The time period of a second pendulum is

1. 4 seconds

2.3 seconds

3.2 seconds

4.6 seconds

The velocity of the mass attached to a spring is maximum at

1.mean position

2.extreme position

3.both (a) and (b)

4.none

The waveform of S.H.M. is

1.standing wave

2.sine wave

3.square wave

4.none

Total distance traveled by bob of simple pendulum in one vibration is equal to

1.amplitude

2.square of amplitude

3.2 x amplitude

4.4 x amplitude

Total distance traveled by bob of simple pendulum in one vibration is equal to

1.amplitude

2.square of amplitude

3.2 x amplitude

4.4 x amplitude

When K.E energy of SHM is maximum its

1.P.E is zero

2.acceleration is zero

3.restoring force is zero

4.all P.E acceleration and restoring force are zero

Which one dows not work according to resonance?

1.T.V

2.radio

3.microwave oven

4.bulb

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