Question # 1

The SI unit of work is

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Newton

Joule

Mol

Calorie

Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

The speed of light was measured correctly by

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Galileo

Michelson

Newton

Maxwell

A double convex lens acts as diverging lens when the object is

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At infinity

Inside the focus

A way from focus

A a large distance from lens

The SI unit of power is

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Joule

Newton

Watt

Kilowatt

A mass of 1 kg is freely falling. The force of gravity is.

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1 N

9.8 N

0.5 N

Zero

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

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Newton

Pascal

Bernoulli

Bu Ali Sina

A set of frequencies which are multiples of the fundamental frequency are called.

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Doppler effect

Nodal frequencies

Beat frequencies

Hamonics

A force of 20 N acts along x axis, tis component is.

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0 N

10 N

20 N

30 N

The dimensional unit of impulse is.

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[MLT]

[MLT-1]

[ML-1T-1]

[M-1L-1T-1]

The unit of rotational K.E. is

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rAD/SEC

Js

J

Kgm2

The value of of 'g' at the centre of the earth is

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Infinite

2 g

3 g

zero

The produce oscillation, body is pulled away from its

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Mean position

Extreme position

Both a and b

None of these

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

1 KWh =

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3.6 x 10³K

3.6 x 10⁶K

3.6 x 10⁹J

3.6 x 10¹²J

An ideal heat engine can only be 100% efficient if its cold temperature reservoir is at.

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0 K

0 ^oC

100 K

100 ^oC

The horizontal component of velocity of projectile

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Increases

Decreases

Remain same

Decreases and then increases

The efficiency of any heat engine can never be

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+ve

100%

-ve

None of these

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