Question # 1

If a stretched string 4 m long and it has 4 loops of stationary waves, then the wave length is.

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1m

2 m

3 m

4 m

The time rate of change of angular displacements called.

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Linear velocity

Linear speed

Angular velocity

Angular speed

The focal length of a concave lens is always

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+ve

-ve

Zero

None of these

If the are of a circle equals its radius, then the angle subtended at the center will be

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1 degree

One rotation

One radian

Half rotation

Damping is the process in which energy

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Increases

Remains constant

Dissipates

None of these

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

If an object lies at focus point F in front of a converd lens, its image is formed at.

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2F

F

3F

Infinity

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

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

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

According to first law of thermodynamics the quantity which is conserved.

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Force

Momentum

Energy

Power

Pi radian is equal to.

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0^o

90^o

180^o

57.3^o

Radar system is an application of.

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Chemical effect

Electric effect

Magnetic effect

Doppler's effect

Fringe spacing in Young's double slit experiment increases due to increase in.

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Slit separation

Wave length

Order of Fringe

Frequency of source

The SI unit of flow rate are

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m-sec^-2

m³-sec^-1

m³-sec^-2

m-sec^-3

the acceleration along x -axis direction in case of projectile is.

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Zero

Equal to gravity

Maximum

Constant

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

The regular or steady flow of fluid is called

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Stream line

Turbulent flow

Average flow

None of these

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