Question # 1

Dot product of two non zero vectors is zero it angle between them is.

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30^o

60^o

45^o

90^o

The equations of angular motion hold only in case when the axis of rotation is

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Moving

Fixed

Both a and b

None of these

If the slope of the velocity time graph remain constant then body is moving with.

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Uniform velocity

Negative variable acceleration

Variable acceleration

Uniform acceleration

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

The unsteady flow of a fluid is called

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Stream line

Turbulent flow

Average flow

Viscous flow

Frequency range of hearing of cats is.

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20-20000 Hz

10- 10000 Hz

60-20000 Hz

60-70000 Hz

If the tension a stretched string is made four times then the velocity of wave.

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Remains same

Is halved

Becomes twice

Becomes 4 times

Michelson's interferometer can be used ot find the

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Velocity of light

Wavelength of light

Velocity of sound

Wavelength of sound

Kg ms-1 can also be written as

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Nm

Ns

Ns-1

Js

The largest satellite system is managed by

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116 countries

126 countries

136 countries

140 countries

A Carnot engine has an efficiency of 50% when its sink temperature is at 27 ^oC. The temperature of source.

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273^oC

300 ^oC

327 ^oC

373 ^oC

Number of seconds in a day is

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9000 sec

3600 sec

86400 sec

43200 sec

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

The relation between the speed and hoop can be written as

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2

4

1/2

1/4

If the temperature of a gas is constant then <1/2 mv2> of the molecules of gas will be.

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Constant

Zero

Increase

Decrease

the systolic pressure of normal healthy person is.

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120 torr

130 torr

115 torr

110 torr

The law of conservation of energy is the basis of.

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Stream line flow

Equation of continuity

Bernoulli's equation

Venture relation

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