A charge `4muC` is located at the centre of one of the edge of a cube . The electric flux through the cube is (all quantities are in SI units)

Options

A. `(4xx10^(-6))/(epsi_0)`
B. `(10^(-6))/(epsi_0)`
C. `(2xx10^(-6))/(epsi_0)`
D. Zero

Answer

B

Explanation

Electric flux `=(q_("enclosed"))/(epsi_0)`
`q_("enclosed") = q/4 = (4xx10^(-6))/(4) = 10^(-6)C`
`phi_("cube") = (q_("enclosed"))/(epsi_0) = (10^(-6))/(epsi_0)`