Question

A point charge +Q is placed just outside an imaginary hemispherical surface of radius R as shown in the figure. Which of the following statements is/are correct?

(A) The electric flux passing through the curved surface of the hemisphere is -Q/2ε₀(1-1/√2)
(B) Total flux through the curved and the flat surfaces is Q/ε₀
(C) The component of the electric field normal to the flat surface is constant over the surface
(D) The circumference of the flat surface is an equipotential

Comments

why negative sign is taken?
will you please explain?

Answer 1

The circumference of the flat surface is an equipotential because the distance of each point on the circumference is equal from + Q ,(D) is the correct option.