Question

keeping the area of cross section of the wire constant if length becomes n times then the new resistance of wire becomes -----------------------​

Answer 1

Resistance=(resistivity×length)/area

Resistance is directly proportional to length and resistivity but inversely to area

R = (pl)/A

l2 = nl

R2 = (pl2)/A

R2 = (pnl)/A

R2 = nR1

Hence if length is increased by n times then resistance is also increased by n times itself.

Answer 2

Answer:

Hope it helps....

Jai Siyaram Ji....