Question # 1

Supplementary units are.

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Three

Two

Five

One

When the amplitude of a wave is increase to doubled is energy.

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Remain the same

Increases 4 times

Increases by two times

Decreases by half

Two quantities involved in work are

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Force and speed

Force and velocity

Force and displacement

Force and acceleration

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

The direction of angular velocity of along the

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Tangent at that point

Axis of rotation

Radius towards the centre

Radius away from the centre

Longitudinal waves do not exhibit

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Reflection

Refraction

Polarization

Diffraction

A phenomenon by which energy is dissipated from the oscillating system is called.

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Forced oscillation

Free oscillation

Damping

Simple harmonic motion

Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes.

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Double

Half

Four times

Remains same

A fog droplets are in freely falling condition,. the ratio of their radii is 2:3, the ratio of their terminal velocities will be.

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2:3

4:6

4:9

9:4

Sound travel faster in

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CO2

H2

O2

He

A stationary waves is established din a string which vibrates in four segments at a frequency of 120 Hz, Its fundamental frequency is.

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15 Hz

30 HZ

60 Hz

480 Hz

The produce oscillation, body is pulled away from its

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Mean position

Extreme position

Both a and b

None of these

The circumference fo the earth was determined by

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Bohr

A Beruni

Ibn al Haithm

Chadwick

When the rocket moves away from the earth, the work against gravity

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Remains constant

Varies directly with distance

Varies inversely with distance

Varies inversely with square of distance

The work done by centripetal force is

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(-)ve

(+)ve

Maximum

Zero

the velocity of sound at 0 ^oC is 332 ms-1, the velocity of sound at 10 ^oC will be

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337.1 ms-1

338.1 ,ms-1

342.1 ms-1

328.1 ms-1

Moment of inertia is measure din

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Kg m2

Kg m-2

Rad s-1

Joule second

The minimum distance from eye at which an object appears to be distinct is

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Near point

Focal length

Image distance from lens

Object distance from lens

When sound waves enter in different medium, the quantity that remains unchanged is.

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Intensity

Speed

Frequency

Wave length

When a particle is moving along a circular path its projection along the diameter executes

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Linear motion

Vibratory motion

Rotatory motion

SHM

Speed of sound in copper is

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38000 ms-1

3600 ms-1

3500 ms-1

3400 ms-1

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