A copper wire of length and radius carries a steady current of
PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity
Problem
A copper wire of length 2m and radius 0.50mm carries a steady current of 5.0A. The number density of free electrons in copper is 8.5×1028m−3.
(a) Calculate the magnitude of the drift velocity of the electrons in the wire.
(b) Estimate the time taken by an electron to drift once through the entire 2m length of the wire at this speed.