Question

Calculate the resistance of a copper wire of length 2m and area of cross section 10^−6msg. Resistivity of copper is 1.7 ×10^−8 ohms meter

Answer 1

Resistance of copper wire= 17 × 10^-8 × 2/ 10^-6 = 17 × 10^-2 ×2 =34/100= 0.34ohm