Inductors

An *inductor* can be made physically using a coil of wire, and it
stores magnetic flux when a current flows through it. Figure C.2
shows a circuit in which a resistor is in series with the parallel
combination of a capacitor and inductor .

The defining equation of an inductor is

where denotes the inductor's stored magnetic flux at time , is the inductance in

where is the voltage across the inductor in volts. Again, the current is taken to be positive when flowing from plus to minus through the inductor.

Taking the Laplace transform of both sides gives

Assuming a zero initial current in the inductor at time 0, we have

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