A small electric dipole is placed at origin with its dipole moment directed along positive x-axis. The direction of electric field at point `(2,2 sqrt(2),0)` is

Options

A. along z-axis
B. along y-axis
C. along negative y-axis
D. along negative z-axis

Answer

B

Explanation

`tan theta=y/x=sqrt(2), cot theta=1/sqrt(2)` Also `tan alpha=(tan theta)/2=1/sqrt(2)=cot theta rArr theta+alpha=90^(@)` i.e., `vec(E)` is along positive y-axis.