Question # 1

The ration of external force applied on the spring to displacement is called:

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Hooke’s law

Constant

Spring constant

Force

The number of wavelength of waves passing through a point in one secnd is called:

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Time period

Cycle

Frequency

None of these

The galvanometer has been named after the scientist:

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Lewis

Lowry bronsted

Luigi Galvano

Galvano Einstein

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

In totally reflecting prism one angle is of:

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45°

90°

180°

120°

The half life of plutonium²³⁶Pu₉₄is:

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2.00 years

2.35 years

2.79 years

2.85 years

The part of waves at which particles of the medium are below the normal position are called:

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Extreme positon

Crest

Trough

None of these

The current which changes its direction is called:

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Current

A.C.

Conventional current

D.C.

It is used in satellite communication:

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Radio waves

Micro waves

Light waves

Electrical waves

If the change of current in a circuit induces a current in another circuit, this phenomena is known as:

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Self induction

Mutual induction

Electromagnetic induction

None mutual induction

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

Radio waves are:

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Electric waves

Electromagnetic waves

X-rays

Radio active ways.

If the potential energy of none coulomb charge is one joule then its potential will be:

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5 volt

2 volt

3 volt

1 volt

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