Question

The electron drift speed is small and the charge of the electron is also small but still, we obtain large current in a conductor. This is due to

• A. the conducting property of the conductor
• B. the resistance of the conductor is small
• C. the electron number density of the conductor is small
• D. the electron number density of the conductor is enormous.

Answer 1

Answer: (D)

the electron number density of the conductor is enormous.

Answer 2

In a conductor, the electron number density i.e., number of electrons per unit volume of a conductor is very large $\left(=10^{28} m ^{-3}\right)$, so large current in a conductor is obtained irrespective of their small drift speed.