A rectangular coil of 20 closely wound turns has length and breadth

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

A rectangular coil of 20 closely wound turns has length

12\,\text{cm}

and breadth

8\,\text{cm}

. It carries a steady current of

4.0\,\text{A}

and is suspended in a uniform magnetic field of

0.25\,\text{T}

. The field lines are parallel to the longer side of the coil. (a) Calculate the magnitude of the turning couple on the coil when the plane of the coil makes an angle of

30^{\circ}

with the magnetic field. (b) For what orientation of the coil will the turning couple vanish? (c) Determine the maximum value of the turning couple that this coil can experience in the given field.

Related theory

Current Loops & Dipoles
Torque on current loop
Torque on a current loop
Moving Charges and Magnetism

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