SelfInductance

# SelfInductance - SELF-INDUCTANCE Consider the following...

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SELF-INDUCTANCE Consider the following circuit: A. When the switch is closed the current does not reach its max value of I = ε/R instantaneously. Faraday’s Law can be used to explain why this occurs. B. When the switch is closed the current increases and the magnetic flux throught the circuit increases. C. This increase in flux induces an EMF such that it would cause an induced current that would oppose the increase in flux through the circuit. D. Such induced EMF would have to be opposite to ε. E. The result is a gradual increase of the current rather than an instantaneous increase. F. This effect is called self-induction because the self-induced EMF arises from the circuit itself. ε L = self-induced EMF (back - emf) The flux through the loop is proportional to the current in the loop:

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## This note was uploaded on 09/02/2011 for the course PHYS 4B taught by Professor Luna during the Spring '11 term at DeAnza College.

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SelfInductance - SELF-INDUCTANCE Consider the following...

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