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Heating Effects of Electric Current

Which of the ...

Question

Which of the following would have the highest resistance?

A

Thin wire

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B

Thick wire

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C

Short wire

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D

A wire made of good conductors

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Solution

The correct option is A
Thin wire

Resistance of a wire is directly proportional to its length and indirectly proportional to its area. Therefore, a long and a thin wire would have the highest resistance.

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