Question

In the circuit shown the diode will conduct current for a

• A. complete cycle of ac input
• B. complete positive cycle of ac input
• C. voltage between 4 V and 6 V of the positive half cycle of input ac
• D. voltage below 4V of the positive half cycle of input ac

Answer 1

Answer: (C)

To conduct current, diode should be forward biased. $\Rightarrow V>4V$
Only for voltage between 4 V and 6 V in positive cycle of input ac the diode is forward biased. So it will conduct for only this part of positive cycle.