Question

The length of a wire is doubled. How is its resistivity affected? no rubbish otherwise reported​

Answer 1

Answer:

the resistivity is also doubled

Explanation:

directly propotional

Answer 2

Explanation:

We know the well known formula that

R = (P×L) / A

R => resistance

P => Resistivity

L => Length of wire

A => Cross-section area

thus,

R = (P×L) / A

P×L = A×R

P = (A×R) / L

Therefore,

P (resistivity) is inversely proportional to the Length of wire.

Thus, More the length , less the resistivity

if Length of wire is doubled, the resistivity decreases by a factor of 2

(Remember I said Resistivity , not Resistance)

that's your answer

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