JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Application +4 | -1

A piece of silver has a resistance of

1 ~\Omega

. What will be the resistance of a constantan wire of one-third length and one-half diameter, if the specific resistance of constantan is 30 times that of silver?

View answer and explanation

Correct option: B

40 ~\Omega

Option B (40

\Omega

) is correct because it correctly uses the relationship between resistance, resistivity, length, and area to find the resistance of the constantan wire.

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