A coil has an area of 100 cm2 with 198 turns connected across a 5.00 Q resistor to form a closed circuit as in the figure. Initially, a 3 T uniform magnetic field points upward through the plane of the coil. The direction of the field then reverses so that the final magnetic field has a magnitude of 3 T and points downward through the coil. If the time interval required for the field to reverse directions is 0.100 s, what is the average current (in units of A) in the coil during that time? В R

A coil has an area of 100 cm2 with 198 turns connected across a 5.00 Q resistor to form a closed circuit as in the figure. Initially, a 3 T uniform magnetic field points upward through the plane of the coil. The direction of the field then reverses so that the final magnetic field has a magnitude of 3 T and points downward through the coil. If the time interval required for the field to reverse directions is 0.100 s, what is the average current (in units of A) in the coil during that time? В R

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter32: Faraday’s Law Of Induction

Section: Chapter Questions

Problem 63PQ

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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.

Question

A coil has an area of 100 cm2 with 198 turns connected across a 5.00 Q resistor to form a closed circuit as in the figure. Initially, a 3 T
uniform magnetic field points upward through the plane of the coil. The direction of the field then reverses so that the final magnetic field
has a magnitude of 3 T and points downward through the coil. If the time interval required for the field to reverse directions is 0.100 s, what
is the average current (in units of A) in the coil during that time?
B

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