The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external

The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external magnetic field H is given by

Options

(a) MH cos θ
(b) 2MH sin²(θ/2)
(c) MH sin θ
(d) MH (1-sin²θ)

Correct Answer:

MH cos θ

Explanation:

MH (1 – cos θ) = work done

.·. W = MH [1 – 1 + 2 sin² (θ / 2)] = 2MH sin² (θ / 2)

admin:

View Comments (1)

Related Questions

  1. During negative β-decay
  2. The work function for aluminium is 4.125 eV. The cutoff wavelength for photoelectric
  3. The displacement of an object attached to a spring and executing simple harmonic
  4. With what minimum acceleration can a fireman slide down a rope while breaking
  5. A transverse wave is represented by y = a sin (?t – kx)