Question

What is the unit of electric flux?

(a) V/m

(b) N/m

(c) V*m

(d) N/Coulomb

I got this question by my college professor while I was bunking the class.

Asked question is from Electric Flux in portion Charges and Fields of Physics – Class 12

Answer 1

The correct choice is (c) V*m

To explain I would say: Flux is equal to the product of field intensity and area of the surface. But field intensity multiplied by a length gives the unit of electric potential as E=-\(\frac {dV}{dx}\). Therefore, flux also means electric potential multiplied by length. This gives us the unit V*m. There is another unit of flux N*m^2*C^-1.