Question # 1

The waves in which particles of the medium vibrate perpendicular to the direction of propagation of waves are called:

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Transverse waves

Longitudinal waves

Electromagnetic waves

None of these

The number of lines of force in a magnetic field depends upon.

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Shape of coil

Sixe of coil

Magnet

Strength of field

The critical angle for a beam of light passing from water into air is 48.8 degrees. This mean that all light rays with an angle of incidence greater than this angle will be:

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Absorbed

Totallly reflected

Partially reflected and partially transmitted

Totally transmitted

Electric potential and e.m.f.

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are the same terms

are the different terms

have different units

both b and c

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added:

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Increases

Decreases

Remains the same

Cannot be predicted

Waves transfer:

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Energy

Wavelength

Velocity

frequency

Who developed the 1st practical electric battery:

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Alessandro volta

Faraday

Newton

None of these

The index of refraction depends on:

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The focal length

The speed of light

The image distance

The object distance

When you rub a plastic rod against your hair several times and put it near some bits of paper, the pieces of papers are attracted towards it. What does this observation indicate?

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the rod and the paper are oppositely charged

the rod acquires a positive charge

the reod and the paper have the same charges

the rod acquires a negative charge

The unit of frequency is:

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Heartz

Vibration per second

Cycle per second

all a, b, c

Totally reflecting prism is used in:

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periscope

binoculars

periscope and binocular

telescope

The unit of (ρ) in formula R=ρ.L/a is______________.

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Ω

Ω-m

Ω-m²

Ω-m^-2

If we double the distance between two charges, then force becomes

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4-times

1/4th

Double

Half

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