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Physics

Physics
A device used for converting a.c. into d.c. is called

Rectifier
Transformer
Dynamo
Induction coil

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Physics
The characteristic invalid for heat radiation is that it travels :

With the speed of light
In all directions
In a straight line
Heating the medium through which it passes

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Physics
The unit for measuring electric power is the

Watts
Volts
Steridian
Watts

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Physics
Which of these is not a simple machine?

The pulley
A ramp
A pair of scissors
A lever

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Physics
As we go from Equator to North pole the value of ''g', the acceleration due to gravity

Remains the same
None of these
Increases
Decreases

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Physics
Waves that are required for long distance wireless communication are

Infrared rays
Radio waves
Ultraviolet rays
Microwaves

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