Question # 1

Which of the following is a method of energy transfer.

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Conduction

Reatiation

wave motion

all of these

Which device is used to increases / decreases A.C Voltage?

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Electric motor

Transformer

A.C Generator

Solenoid

Time period is reciprocal of:

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Frequency

Cycle

Wave-length

Amplitude

A conductor of electric current is:

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Wood

Rubber

Plastic

Copper

The ray of light striking to the side of prism is called:

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refraction ray

incident ray

reflected ray

emergent ray

How many tubes or electron guns used in a colour television set:

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Two

Four

Five

Three

The angle at which prism deviates the incident ray is called:

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Angle of incident

Angle of reflection

Angle of deviation

Angle of minimum deviation

If a wave moves in a slinky spring with frequency of 4Hz and wave length of 0.4m, the speed of the wave will be:

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1.0 ms-1

1.2 ms-1

1.4 ms-1

1.6 ms-1

The wave properties

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Reflection

Refraction

Diffraction

All of these

Totally reflecting prism turns the incident ray at an angle of:

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90^o

60^o

75^o

45^o

The force applied on the mass attached with a spring is represented by:

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F_a

F_c

F_ext

F_s

Electric field lines:

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always cross each other

never cross each other

cross each other inthe region of strong field

cross each other in the region of weak field

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

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Its direction

Its speed

its frequency

Its wavelength

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