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Physics

Physics
What is the unit of the physical quantity "Inductance"?

Henry
Farad
Weber
Tesla

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Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

R/5
4 R/5
5 R/4
5 R

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Physics
Middle latitude cyclones are fueled by?

All of these
Polar continental air masses
Energy from falling precipitation
Air high in the atmosphere

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Physics
The component used for tuning a radio is basically a variable

Condenser
Inductor
Transformer
Resisto

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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
Pipelines in cold countries often burst in winter, because

Pipelines expand due to freezing
Temperature of ice is less than that of water
Water freezes and expands in its volume
Pipelines contract in their volume

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