Question # 1

The S.I unit of intensity of sound is:

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Wm

Wm2

Wm-2

Wm-1

electroscope can also be charges by the process of:

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electrostatics

electricity

convection

conduction

which can be used to distinguish between insulators and conductors:

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electricity

telescope

temperature

electroscope

The symbol of alpha particles is:

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4AHe

42He

0-1B

00Y

The unit of frequency is:

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Heartz

Vibration per second

Cycle per second

all a, b, c

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

Which is not an e.m.f source:

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Generator

Solar cell

Battery

Rheostat

The speed of sound in air at 100°C is:

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380ms-1

382ms-1

386ms-1

300ms-1

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

Application of electrostatic is:

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Car painting

Photocopying

Extracting of dust

All of these

electric intensity is a quantity:

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scalar

vector

base

none of these

The true ratio of a transformer is 10. It means:

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Vs = 10Vp

Ns = Np/10

Ns = 10NP

VS= Vp/10

Value of ‘k’ depends upon:

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System of unit

Nature of medium

Both a and b

None of these

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