# A sinusoidal AC voltage source feeds a pure inductor through a diode as shown in the figure. The duration of conduction (in degrees) of the diode in one input power cycle is

A sinusoidal AC voltage source feeds a pure inductor through a diode as shown in the figure. The duration of conduction (in degrees) of the diode in one input power cycle is

### Right Answer is: 360°

#### SOLUTION

The waveform of the source voltage, inductor voltage, and inductor current for the above circuit is shown in figure

• From the waveform of inductor current i0 we can observe that the current in the circuit is unidirectional (i.e. current through the diode only flows in one direction) and flows for the entire 2π duration.
• As the current is unidirectional it means the diode doesn’t undergo reverse bias condition and hence is in the forward bias or on the state for the entire 2π duration.
• Therefore, the duration of conduction (in degrees) of the diode in one input power cycle is 360°.
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