Question

length increases by 4 time and radius decrease by half the new resistance​

Answer 1

Answer:

R2 = 16R

Explanation:

R= ρl/A = pl/πr^2

R1 = R     R2 = ?

L1 = l       L2 = 4l

r1 = r       r2 = r/2

R1/R2 = (l1/l2) x (r2/r1)^2

= (l/4l) x (r/2r)^2

= (1/4) X (1/4)

=1/16

R2 = 16R1

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