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))`