A spherical conductor `A` contains two spherical cavities as shown in Fig.2.127. The total charge on conductor itself is zero . However , there is a point charge `q_(1)` at the center of one cavity and `q_(2)` at the center of the other cavity . Another charge `q_(3)` is placed at a large distance `r` from the center of the spherical conductor.

If `q_(1)` is displaced from its center slightly (being always inside the same cavity ), then the correct representation of field lines inside the same cavity is

Options

A.
B.
C. There will be no field lines inside the cavity.
D.

Answer

B

Explanation

Thereis charge inside cavity , so field lines will be present , but the potential at surface of conductor is same everywhere . So field lines should be perpendicular .