Question

A short bar magnet of magnetic moment 0.4J T⁻¹
is placed in a uniform magnetic field of 0.16 T. The
magnet is in stable equilibrium when the potential
energy is
(a) – 0.64 J (b) zero
(c) – 0.082 J (d) 0.064 J

Answer 1

Answer:

(A)-0.64J

Explanation:

U=-m.b or mb cosΦ

AND Φ=0 for stable equilibrium.