Question

iif 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:R=kA/l

Explanation:

Answer 2

The length of the wire is directly proportional to the value of resistance .

Explanation:

According to the formula ,

$R = p \frac{l}{A}$

Where ,

R = resistance ,

p = resistivity

l = length of the wire

A = cross sectional area of the wire .

Hence , from the above relation ,

The resistance is directly proportional to the length of the wire and inversely proportional to the cross sectional area of the wire ,

Hence , increasing the length of the wire , the resistance increases ,

and , decreasing the length of the wire , the resistance decreases .

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