Introduction to electromagnetism: Difference between revisions

Revision as of 18:21, 15 June 2022

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=== Inductors ===

An [[inductor]] is an electronic component that stores energy in a magnetic field inside a coil of wire. A current-carrying coil of wire induces a magnetic field according to [[Ampère's circuital law]]. The greater the current ''I'', the greater the energy stored in the magnetic field and the lower the [[inductance]] which is defined <math display="inline">L= \Phi_B/I</math> where <math display="inline">\Phi_B</math> is the magnetic flux produced by the coil of wire. The inductance is a measure of the circuitscircuit's resistance to a change in current and so inductors with high inductances can also be used to oppose [[alternating current]].<ref>{{Cite book|last=Purcell, Edward M.|url=https://www.worldcat.org/oclc/805015622|title=Electricity and magnetism|date=21 January 2013|isbn=978-1-107-01402-2|edition=Third|___location=Cambridge|pages=374|oclc=805015622}}</ref>

=== Other circuit components ===