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Physics

Physics
Electric Motor converts ________ energy to mechanical energy

Mechanical
Chemical
Sound
Electrical

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Physics
Friction can be reduced by changing from

Rolling to Sliding
Static to Dynamic
Sliding to Rolling
Dynamic to Static

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Physics
The width of depletion layer of a P-N junction

Decreases with light doping
Increases with heavy doping
Is increased under reverse bias
Is independent of applied voltage

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Physics
Why is weightlessness experienced while orbiting the earth in space ships ?

Inertia
Zero gravity
None of these
Acceleration

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Physics
An object at rest will remain at rest and an object in motion will remain in motion until and unless it is acted upon by an external force. This is Newton's

First law
Third law
Fourth law
Second law

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Physics
A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipated will be

P
< P
> P
2P

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