Question

A 1 m long copper wire carries a current of 1 A. If the cross section of the wire is 2.0 mm2 and the resistivity of copper is 1.7 × 10–8 Ω, the force experienced by moving electron in the wire is ___ × 10–23N.
(Charge on electron = 1.6 × 10–19C)

Answer 1

The correct answer is 136
I = nevdA
$J=\frac{E}{ρ}$
$F=eE=\frac{1.7×1.6×10^{−19}×10^{−8}}{2×10^{−6}}$
$=136×10^{–23}N$