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Physics

Physics
Positive feedback is used in

Amplifiers
None of these
Oscillators
Rectifiers

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Physics
Light travels fastest in

Water
Air
Glass
Diamond

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Physics
What is the full form of "RADAR" ?

Radio Detecting and Ranging
Radio Detect and Rangs
Region Device and Ranging
Radio Device and Ranging

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Physics
Convex mirror is generally used in ________

Rear view mirror
Opthalmoscope
Solar cookers
Reflector for head light

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Physics
A concave lens always forms

An image type which depends on object characteristics
An image type which depends on lens curvature
A real image
A virtual image

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Physics
The resistance of a conductor is inversely proportional to its:

Resistivity
Temperature
Area of cross section
Length

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