EEE117 Lecture 4: Magnetic Circuits & Time Variation

The flux linkage for a coil in a magnetic circuit is the flux multiplied by the number of turns, N, of the coil.

The induced emf is equal to the rate of change of flux linkage with respect to time, as per Faraday's law.

Self-inductance is a measure of the ability of a coil with N turns to produce a magnetic field due to a time-varying current flowing through it.

<p>The electrical behavior of a magnetic component can be represented by introducing self-inductance, L, in series with resistance, R.</p> Signup and view all the answers

<p>When excited by a step voltage, a magnetic component exhibits transient behavior with a time-varying current due to the presence of self-inductance and resistance.</p> Signup and view all the answers

<p>Indicates how quick the current/flux builds up</p> Signup and view all the answers

<p>Time constant</p> Signup and view all the answers

<p>v = Vcos(ωt)</p> Signup and view all the answers

<p>Current lags voltage</p> Signup and view all the answers

<p>Current and voltage are out of phase by θ</p> Signup and view all the answers