Question

Calculate the resistance of 50cm length of wire of cross sectional area 0.01mm²and of resistivity 5 x 10⁸Ω m.
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Answer 1

Explanation:

Resistance, R = (rho×l)÷ A

(rho- resistivity, l - length, A - area)

rho = 5×10^8

l =50×10^-2 m

A = 1×10^-8 sq. m

R = [5×10^8×50×10^-2] ÷ (1×10^-8)

= 2.5 × 10^16 ohm