Q. The current density (number of free electrons per $m^{3}$) in metallic conductor is of the order of
A) $10^{22}$
B) $10^{24}$
C) $10^{26}$
D) $10^{28}$
Explanation
(d) The current density of electrons in a metallic conductor $= 10^{22}cm^{- 3} = 10^{28}m^{- 3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.