Question

Total electric flux coming out of a unit positive charge kept in air is ______.

Options

• `epsilon_0`

• `epsilon_0^-1`

• `(4piepsilon_0)^-1`

• `4piepsilon_0`

Answer 1

Total electric flux coming out of a unit positive charge kept in air is `underline(epsilon_0^-1)`.

Explanation:

Total flux coming out from the unit charge is

`phi = vec"E" * vec"ds" = "q"/epsilon_0 = epsilon_0^-1`   (∵ q = 1)