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Physics

Physics
A multimeter is used to measure

Voltage
Current
Resistance
All of these

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Physics
Sound travels fastest in

Glass
Vacuum
Water
Air

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Physics
Alpha particle is the nucleus of an atom of

Helium
Lithium
Hydrogen
Oxygen

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Physics
Unit of impedance is ________

Henry
Ohm
Hertz
Tesla

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Physics
Longitudinal waves cannot travel through

Gas
Liquid
Vacuum
Solid

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Physics
Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes

5R/4
2R
3R/4
R/2

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