Question

A circular loop carrying a current is replaced by an equivalent magnetic dipole. A point on the axis of the loop is in

(a) end-on position
(b) broadside-on position
(c) both
(d) none

Answer 1

(a) end-on position

Points lying on the axis of a magnet are called end-on points. In our case, the point on the axis of the loop (on replacing the circular loop with an equivalent magnetic dipole) lies on the axis of the magnetic dipole or on the end-on position.
If P was the point on the axis of the loop, then it is clear from the figure that P lies on the end-on position of the equivalent magnetic dipole.