Question

When a current in a circular loop is equivalently replaced by a magnetic dipole,
(a) the pole strength m of each pole is fixed
(b) the distance d between the poles is fixed
(c) the product md is fixed
(d) none of the above

Answer 1

Hey maTe..!!

Your Answer is..!!

When a current in a circular loop is equivalently replaced by a magnetic dipole,

(a) the pole strength m of each pole is fixed

(b) the distance d between the poles is fixed

(c) the product md is fixed

(d) none of the above

Answer 2

When a current in a circular loop is equivalently replaced by a magnetic dipole, the product md is fixed

Explanation:

The pole force m and the separation between the poles isn't fixed when We substitute a circular loop holding the current with a magnetic dipole resembling circular loop field lines.

But, the dipole's magnetic moment is always set in both systems. It's The proceeds of the magnetic moment, And the distance to the poles. Md is set to put it another way.

An actual loop of region A and current could I  be replaced by a dipole moment md magnetic dipole.

i.e. md = IA

Therefore the correct answer is Option (c)