Question

A wire of Resistance R is doubled on itself. Its new resistance will be?

Answer 1

Answer:

2rho ×L

/A

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Answer 2

Answer:

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When a given metallic wire is doubled on itself, its length is reduced to half, but its area of cross-section gets doubled. So, the resistance of the wire will become one-fourth i.e., the new resistance of wire will be R/4 (or 0.25 R).