mutual and self induction
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Mutual- and Self-Induction
The changing magnetic field created by one circuit (the primary) can induce a changing voltageand/or current in a second circuit (the secondary).The mutual inductance, M, of two circuits describes the size of the voltage in the secondaryinduced by changes in the current of the primary:
change in I (primary) V(secondary) = M * change in time
The units of mutual inductance are henry, abbreviated "H".A circuit can create changing magnetic flux through itself, which can induce an opposing voltagein itself. The size of that opposing voltage is
change in IV(opposing) = L *
change in time
where Lis the self-inductanceof the circuit, again measured in henries.
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Copyright Michael Richmond. This work is licensed under a Creative CommonsLicense.
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