A square coil of turns and side carries a current of

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Energy and Momentum of Rotating Systems · Energy and Momentum of Rotating Systems

Problem

A square coil of

200

turns and side

10\,\text{cm}

carries a current of

2\,\text{A}

. It rotates at

1500

revolutions per minute in a uniform magnetic field of

0.40\,\text{T}

, the axis of rotation being perpendicular to the field. Assuming the torque is maximum throughout the rotation, calculate the mechanical power developed by the coil. (a)

1.8\times10^{2}\,\text{W}

(b)

2.5\times10^{2}\,\text{W}

(c)

4.0\times10^{2}\,\text{W}

(d)

4.0\times10^{1}\,\text{W}

Related theory

Current Loops & Dipoles
Work & Energy in Rotation
Torque on current loop
Torque on a current loop
Moving Charges and Magnetism

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