Question # 1

Bouncing back of light after striking the surface is called:

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Refraction

Reflection

Diffraction

Interference

The intensity of lawn mover is:

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10^-1 wm^-2

10^-2wm^-2

10^-1wm^-3

10^-3wm^-2

the waves have properties:

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reflection

refraction

diffraction

all of these

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

In simple Harmonic motion, the acceleration of the body is _____ proportional to the displacement.

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Inversely

Directly

Equally

None of these

1 nano farad is equal to:

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1 x 10^-12 F

1 x 10⁹F

1 x 10^-9F

1 x 10^-6F

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

According to Ohm's law V =________

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I²R

IR²

IR

I/R

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 refractive index of air is:

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6

7

2

1,0003

electric field is weak when:

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lines are far apart

lines are close together

no lines are present

lines are directed outside

The 1st practical electric battery is known as:

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Voltaic

Pile

Voltaic pile

Voltaic cell

1 Pico farad is equal to:

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10^-9F

10¹²F

10^-12F

10^-6F

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