Question # 1

The sound waves are the example of:

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Longitudinal waves

Transverse waves

Electromagnetic waves

x-rays

Which of the following is not processing:

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Arranging

Manipulating

Calculating

Gathering

Positive charge in an electric field always tend to move:

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Does not move

From lower to higher potential

From higher to lower potential

All of these

Time period is reciprocal of:

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Frequency

Cycle

Wave-length

Amplitude

The vacuum all electromagnetic wave have the same

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speed

frequency

amplitude

wavelength

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

SI unit of electric intensity is:

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Watt

NC^-1

NS^-1

Nm

According to ohm’s law V= :

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I²R

IR²

IR

I/R

The current which changes its direction is called:

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Current

A.C.

Conventional current

D.C.

Wave equation is defined as:

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f = Tλ

f = V λ

V = 2fλ

V = fλ

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

The product of charge ‘q’ and potential difference is equal to:

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Power

Force

Capacitance

Energy

An object is 14 cm is front of a convex mirror. The image is 5.8 cm behind the mirror. What is the focal length of the mirror?

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4.1 cm

8.2 cm

9.9 cm

20 cm

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