Question # 1

The commercial unit of electric energy is

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Kilo watt hour

watt

Watt hour

Kilo Watt

Which of the following is not directed along the fixed axis of rotation.

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Angular displacement

Angular momentum

Centripetal acceleration

Angular acceleration

the velocity of sound is maximum at 20 ^oC in

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Lead

Copper

Glass

Iron

More details of an object can be seen with a microscope by using

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Green light

Red light

Yellow light

Blue light

The to and fro motion of a body is called

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Linear motion

Rotational motion

Vibratory motion

None of these

Bunsen burner works on the principle of.

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Venturi effect

Terricilli's effect

Bernoulli's effect

None of these

The distance between two consecutive trough is called.

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Displacement

Amplitude

Wave length

Wave front

A spring has a spring constant k. If it is cut in two equal parts, the spring constant of each part will be

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K

2 K

K/2

4K

The formula for the power is

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P= W/d

P=W/v

P=W/t

P=Wt

In S.H.M, the acceleration of the body is directly proportional to

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Weight of body

Applied force

Amplitude

Displacement

the systolic pressure of normal healthy person is.

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120 torr

130 torr

115 torr

110 torr

No body begins to move or comes to rest of itself was given by

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Newton

Pascal

Bernoulli

Bu Ali Sina

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Unit vector

+ve of a vector

Resultant vector

-ve of a vector

Kilo watt hour is the unit of

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Power

Energy

Force

Torque

Increase in the velocity of sound in air for 1 ^oC rise in temperature is.

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61 ms-1

0.61 ms-1

161 ms-1

261 ms-1

A ball is thrown up vertically, it takes 3 sec to reach maximum height. Its initial velocity is.

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10 ms-1

12.2 ms-1

15 ms-1

29.4 ms-1

If velocity 'v' of an object is double, then K.E. because.

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Remain same

Sixteen times

Double

Four times

The relation between the speed and hoop can be written as

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2

4

1/2

1/4

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