question_answer 25)

  The output of the given circuit in Fig. 9(EP).4. 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) 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 series. Due to it, there will be voltage across p-n junction with negative cycle in output. Thus, option (c) is correct.