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Physics

Physics
Conversion of sound energy into electrical energy is done by

Microphone
Loudspeaker
Solar cell
Gramophone

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Physics
In a photocell light energy is converted into

Electrical energy
Chemical energy
Heat energy
Potential energy

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Physics
What type of simple machine is an axe?

The screw
Lever
Both A & B
Wedge

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Physics
The electric current in a metal wire is due to the flow of -

Electrons
Protons
Holes
Ions

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Physics
The radiation initially produced in fluorescent tube is

Ultraviolet
X-rays
Microwaves
Infrared

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Physics
Which of the following is correct about the properties of Gravitational Forces?

They are the strongest forces in nature
They observe inverse square law
None
Both a and b

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