A circular coil (radius = 0.25 m) has 143 turns and is in a uniform magnetic field. If theorientation of the coil is varied through all possible positions, the maximum torque onthe coil by magnetic forces is 0.29 N·m when the current in the coil is 2.7 mA. What isthe magnitude of the magnetic field?

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Answered: A circular coil (radius = 0.25 m) has…

A circular coil (radius = 0.25 m) has 143 turns and is in a orientation of the coil is varied through all possible positic the coil by magnetic forces is 0.29 N·m when the current i

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 84AP: A circular coil of radius 5.0 cm is wound with five turns and carries a current of 5.0 A. If the...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

A circular coil (radius = 0.25 m) has 143 turns and is in a uniform magnetic field. If the
orientation of the coil is varied through all possible positions, the maximum torque on
the coil by magnetic forces is 0.29 N·m when the current in the coil is 2.7 mA. What is
the magnitude of the magnetic field?

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