For the diode–resistor circuit driven by an AC input as shown, which of the four labelled waveforms correctly represents the potential difference across the diode D? Image
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Question

For the diode–resistor circuit driven by an AC input as shown, which of the four labelled waveforms correctly represents the potential difference across the diode D? Image

G1 Physics · Accepted Answer

Step 1: In the positive half cycle, the diode in the given orientation is reverse-biased; it behaves like an open circuit. Almost the entire applied positive half-cycle voltage appears across the diode. Step 2: In the negative half cycle, the ideal diode is forward-biased and acts as a short circuit. The diode voltage is zero. Step 3: The diode voltage therefore consists of positive half-wave sinusoidal pulses separated by zero-voltage intervals. Final answer: The source waveform labelled D (Op…