A certain electric motor consists of a thin rectangular coil of current-carrying wire that rotates in the presence of a uniform magnetic field of magnitude 0.800 T. The coil has 84 turns of wire, and is 2.25 cm wide by 3.81 cm long. When the coil is oriented so that the plane of the rectangle is perpendicular to the magnetic field, it carries a current of 10.1 mA, and its magnetic dipole moment points in the opposite direction of the magnetic field. The coil then rotates one half revolution, and the direction of its dipole moment is then flipped so that the process repeats itself. In this way, the coil continues to rotate at an angular speed of 3.48 x 103 rev/min. (a) What is the maximum torque acting on the coil (in N• m)? (Enter the magnitude.) N. m (b) What is the peak power output of the motor (in W)? W (c) How much work (in J) is performed by the magnetic field on the rotor in every full revolution? J

A certain electric motor consists of a thin rectangular coil of current-carrying wire that rotates in the presence of a uniform magnetic field of magnitude 0.800 T. The coil has 84 turns of wire, and is 2.25 cm wide by 3.81 cm long. When the coil is oriented so that the plane of the rectangle is perpendicular to the magnetic field, it carries a current of 10.1 mA, and its magnetic dipole moment points in the opposite direction of the magnetic field. The coil then rotates one half revolution, and the direction of its dipole moment is then flipped so that the process repeats itself. In this way, the coil continues to rotate at an angular speed of 3.48 x 103 rev/min. (a) What is the maximum torque acting on the coil (in N• m)? (Enter the magnitude.) N. m (b) What is the peak power output of the motor (in W)? W (c) How much work (in J) is performed by the magnetic field on the rotor in every full revolution? J

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter22: Magnetic Forces And Magnetic Fields

Section: Chapter Questions

Problem 71P: Assume the region to the right of a certain plane contains a uniform magnetic field of magnitude...

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A circular coil of radius 5.0 cm is wound with five turns and carries a current of 5.0 A. If the coil is placed in a uniform magnetic field of strength 5.0 T, what is the maximum torque on it?
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