Question

A bar-magnet of magnetic moment 1.5 A m', when
suspended perpendicular to a magnetic field.is
acted upon by a couple of 0.24 N-m (a) What is the
magnitude of the magnetic field? (b) What will be
the change in the potential energy of the magnet in
coming from this position to the position of steady
equilibrium? (c) If this magner is equivalent to a
current-carrying oil of 100 turns having a surface
area of 150 cm", then what will be the current in the
coil?
Ans.(a) 0.16 T. (b) 0.24J, LO A​

Answer 1

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Explanation: