The figure below displays a circular loop of aluminum wire in a uniform magnetic field pointing into the page. The radius of the loop is 14.0 cm and the magnitude of the field is 0.110 T. You grab points A and B and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.250 s to do so. What is the magnitude of the average induced emf in the loop (in mV) during this time?

The figure below displays a circular loop of aluminum wire in a uniform magnetic field pointing into the page. The radius of the loop is 14.0 cm and the magnitude of the field is 0.110 T. You grab points A and B and pull them in opposite directions, stretching the loop until its area is nearly zero, taking a time of 0.250 s to do so. What is the magnitude of the average induced emf in the loop (in mV) during this time?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter11: Magnetic Forces And Fields

Section: Chapter Questions

Problem 104CP: A particle’s path is bent when it passes through a region of non-zero magnetic field although its...

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Concept explainers

Electromagnets

The word "electromagnet" is composed of two words, ‘electro’ and ‘magnet’. It is a type of magnet in which an electric current helps in the generation of a magnetic field. Electromagnets usually consist of two major parts, wire and a coil around which the wire is wound. This is called a solenoid. When an electric current is allowed to pass through the coiled wire, the electric current produces a magnetic field. This magnetic field is present only when current is passing through the wire.

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(c) How much work (in J) is performed by the magnetic field on the rotor in every full
revolution?
(d) What is the average power of the motor (in W)?
2- Chapter 30-
The figure below displays a circular loop of aluminum wire in a uniform magnetic field
pointing into the page. The radius of the loop is 14.0 cm and the magnitude of the field is
0.110 T. You grab points A and B and pull them in opposite directions, stretching the
loop until its area is nearly zero, taking a time of 0.250 s to do so. What is the magnitude
of the average induced emf in the loop (in mV) during this time?
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