Question

Diameter of wire is 1cm its resistance is 0.15ohm and its diameter is reduces to50%of the original what is new resistance

Answer 1

Answer:

0.067 ohm

Explanation:

R = (resistivity)*L/A

A=pi*r^2

original area = pi*10^-4

(resistivity)*L = 15*pi*10^-6

new radius will be = 1cm+50/100 *1cm =1.5cm

new resistance calculations attachment