Two short magnets of magnetic moment `1000 Am^(2)` are placed as shown at the corners of a square of side `10 cm`. The net magnetic induction at P is

Options

A. `0.1` T
B. 0.2 T
C. 0.3 T
D. 0.4 T

Answer

A

Explanation

`B_(1) = (mu_(0))/(4pi). (M)/(d^(3)) = 10^(-7) xx (1000)/((0.1)^(3))= 0.1T`
`B_(2)= (mu_(0))/(4pi).(2M)/(d^(3))= 10^(-7) xx (2 xx 1000)/((0.1)^(3))= 0.2T`
`B_("net") = B_(2)- B_(1)= 0.1T`