A bar magnet having a magnetic moment of 2 * 10 ^ 4 * J * T ^ - 1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 * 10 ^ - 4 * T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60° from the field is - VgyanHub

Question:

A bar magnet having a magnetic moment of 2 *10⁴ JT^{– 1} is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 * 10^{– 4}T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60° from the field is

Screenshot 2025-01-05 120944

Options :

(a)0.6J
(b)12J
(c)6J
(d)2J

Answer :

Ans: – (c)6J

Answer Steps :

Step 1: –

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