Physics, asked by GDSB3270, 10 months ago

The resistance of a wire of length 250 m is 1 ohm. If the resistivity of the material of wire is 1.6 x 108 ohm meter, find the area of cross-section of the wire. How much does the resistance change if the diameter is doubled?

Answers

Answered by sanyamaske

1

when diameter is doubled,

the resistance becomes

$\frac{1}{4} r$

where r is the resistance before doubling of diameter.

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