Question

V/m is the unit of ______

(a) Electric field intensity

(b) Electric flux

(c) Electric potential

(d) Charge

This question was posed to me during an interview for a job.

I'd like to ask this question from Electric Field in division Charges and Fields of Physics – Class 12

Answer 1

Right choice is (a) Electric field intensity

Easiest explanation: E=-\(\frac {dV}{dx}\) where E is the field intensity, V is potential and x is distance. Therefore unit of electric field intensity will be \(\frac {unit \, of \, potential}{unit \, of \, distance} = \frac {V}{m}\). Electric flux has unit V*m, V is the unit of electric potential whereas charge has a unit of Coulomb or esu.