A 5 H inductor carries a current of 2 amps. How can a self-induced EMF of 50 volts be made to appear across the inductor? Change the current to 10 A. Change the current uniformly to zero in 20 seconds. Break the circuit instantaneously. Change the current at the rate of 10 A/s None of these

A 5 H inductor carries a current of 2 amps. How can a self-induced EMF of 50 volts be made to appear across the inductor? Change the current to 10 A. Change the current uniformly to zero in 20 seconds. Break the circuit instantaneously. Change the current at the rate of 10 A/s None of these

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter31: Inductance

Section: Chapter Questions

Problem 1P

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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 5 H inductor carries a current of 2 amps. How can a self-induced
EMF of 50 volts be made to appear across the inductor?
Change the current to 10 A.
Change the current uniformly to zero in 20 seconds.
Break the circuit instantaneously.
Change the current at the rate of 10 A/s
None of these

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