Question

Predict the effect of length of conductor on drift velocity of electrons.

(a) Drift velocity varies linearly with the length of conductor

(b) Drift velocity does not depend on the length of conductor

(c) Drift velocity increases with the increasing length of conductor

(d) Drift velocity decreases with the increasing length of conductor

The question was asked during an online exam.

This interesting question is from Current Electricity in division Current Electricity of Physics – Class 12

Answer 1

Right choice is (d) Drift velocity decreases with the increasing length of conductor

Best explanation: The drift velocity of electrons decreases when the length of the conductor is increased.

Drift velocity = \(\frac {Potential \, difference}{(number \, of \, electrons \, \times \, charge \, of \, electron \, \times \, length \, of \, conductor \, \times \, density)}\).