Calculate the electric field in a copper wire of cross-sectional area 2 mm² carrying a current of 1A. The resistivity of copper = 1.7 x 10^-8 ohm-m

Q. Calculate the electric field in a copper wire of cross-sectional area 2 mm2 carrying a current of 1A . The resistivity of copper ρ = 1.7 x 10-8 ohm-m

(a) 8.5 mvm-1
(b) 8 mvm-1
(c) 9 mvm-1
(d) 7 mv/m
Ans: A

Resistance R = ρL/A => L= RA/ρ

Since V = IR and V = EL => E = V/L

Author: Rajesh Jha

QuantumStudy.com

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