NCERT 4.12 - Moving Charges and Magnetism
Question: (a) A circular coil of 30 turns and radius 4.0 cm is situated in a uniform magnetic field of 1.0 T. The magnetic moment of the coil is 10.0 J/T. What is the maximum torque the coil can experience? (b) For what orientation is the potential energy minimum and maximum?
Answer: (a) Maximum torque = 10.0 N·m; (b) Minimum PE at θ = 0° (-10 J), Maximum PE at θ = 180° (+10 J)
Full step-by-step NCERT solution with diagrams on Something by Zero.