Question # 1

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

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Focus

Circle

Axis

Radius

In OR operation inputs are connected as:

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Series

Parallel

Both series or parallel

None of these

The loudness of a sound is most closely related to its:

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Frequency

Period

Wavelength

Amplitude

Which is an example of a longitudinal wave?

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Sound wave

Light wave

Radio wave

Water wave

Which of the following is a method of energy transfer.

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Conduction

Reatiation

wave motion

all of these

Five joules of work is needed to shift 10 C of charge from one place to another. The potential difference between the places is:

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0.5 V

2 V

5 V

10 V

As the temperature of a conductor rises, its resistance:

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Increases

Decreases

Does not change

None of these

The S.I unit of Spring constant is:

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Nm

N

Nm-1

Ns

The emission of electron from the surface of hot metal is called:

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Ionization

Conduction

Thermionic emission

Convection

The current used in houses is:

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A.C.

Conventiona current

Current

D.C

Which technology is used in mobile phone:

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Heat

Radio

Light

Laser

Shock absorbers in automobiles are one practical application of:

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SHM

Random motion

Damped motion

None of these

Which is an example of a longitudinal wave:

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Sound wave

Light wave

Radio wave

Water wave

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