Question

A copper wire has a diameter of 0.5mm and resistivity of 1.6 x 10^-8 ohm meter

(i) What will be the length of this wire to make the resistance 12 ohm?
(ii) How much will be the resistance of another copper wire of the same length but half the diameter?

Answer 1

Answer:

diameter of wire = 0.5 mm

resistivity if copper wire = 1.6*10^-8

Answer 2

Step-by-step explanation:

diameter of wire = 0.5 mm

resistivity =1.6*10^-8