Question

if the length and area of cross section of a copper wire is changed, guess the changes in the specific resistance of copper wire.​

Answer 1

Answer:

length of wire directly proportion resistance. wire length is changed resistance also change . area of criss section in inversely proportion resistance

Answer 2

The specific resistance of copper wire

Explanation:

The specific resistance of a wire is given by the below formula as :

$R=\rho\dfrac{l}{A}$

Here,

$\rho$ is the resistivity of the wire

l is the length of the wire

A is the area of cross section of the wire

So, it is clear that the specific resistance of a wire is directly proportional to its length and inversely proportional to the area of cross section of the wire.

If the length of wire changes, its resistance will change while if its area is charged, its resistance will also change but inversely.

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