A point charge +q, is placed at a distance d from an isolated conducting plane. The field at a point P on the other side of the plane is

Options

A. directed perpendicular to the plane and away from the plane.
B. directed perpendicular to the plane but towards the plane.
C. directed radially away from the point charge.
D. directed radially towards the point charge.

Answer

A

Explanation

Positive point charge will induce negative charge on the conducting surface near it and positive charge on the other side. Electric field lines are shown in the figure. Electric field lines are always perpendicularto metal surface in electrostatic condition. Induced charge will be distributed in such a manner that electric field lines become perpendicular to metal surface. The electric field at a point P on the other side of the plane is directed perpendicular to the plane and away from the plane.