Question

a wire of resistivity p is stretched to double its length. what is the new resistance?

Answer 1

Thus so

____________________________________ @g _____________________

GIVEN

p = 2 L

AS
.
. R = p L / A

. R IS DIRECTLY PROPORTIONAL TO RESISTIVITY

THEN
AS p IS DOUBLE THE LENGTH

. THE NEW RESISITANCE IS DOUBLE THE LENGTH

. Hope it helps