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Ohm's Law

If a wire of ...

Question

If a wire of circular cross-section area is used in an electrical circuit, then the resistivity of the wire can be changed by changing its ______.

A

shape

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B

temperature

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C

area

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D

length

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Solution

The correct option is B temperature
The resistivity of the material is independent of the length and cross-section area. It depends on the property of the material and the temperature. Resistivity of metals increases with temperature.

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