Magnetic inducton at a point on the axial line of a short bar magnet is `B` towards east. If the magnet is turned through `90^(0)` in clock wise direction, then magnetic induction at the same point is (Neglect earth's magnetic field)

Options

A. B/4 towards east
B. B/2 towards west
C. B/2 towards north
D. B/2 towards south

Answer

C

Explanation

`B_(a)=mu_(0)/(4pi)(2M)/d^(3),B_(e)=mu_(0)/(4pi)M/d^(3)`