Not understood the solution of example 14 - Physics - Magnetism And Matter

Question

Not understood the solution of example 14?

Debalina Deb · Accepted Answer

Dear student,
considering the magnetic needle is turned throw an angle
300
here is the solution;
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_619f7571418fd%20jpg"
style="width: 1022px; height: 542px;">
Regards,