The output of the given circuit in Fig.

Options

A. would be zero at all times
B. would be like a half wave rectifier with positive cycles in output
C. would be like a half wave rectifier with negative cycles in output
D. would be like that of a full wave rectifier

Answer

C

Explanation

During positive half cycle of input a-c voltage, the p-n junction is forward biased. The resistance of p-n junction is low. The current in the circuit is maximum. In this situation, a maximum potential difference will appear across resistance connected in series of circuit. Due to it, there is no output voltage across p-n junction.
During the negative half-cycle of input a.c. voltage the p-n junction is reverse biased. The resistance of p-n junction becomes high which will be more than resistance in serier. Due to it, there will be voltage across p-n junction with negative cycle in output.