Question

In the circuit given below, $V\left(t\right)$ is the sinusoidal voltage then source voltage drop $V_{AB}\left(t\right)$ across the resistance $R$

• A. is half-wave rectified.
• B. is full-wave rectified.
• C. has the same peak value in the positive and negative half cycles.
• D. has different peak value during positive and negative half cycles.

Answer 1

The correct option is D has different peak value during positive and negative half cycles.

For positive half cycle: In this condition, $D_1$ is reverse biased and $D_2$ forward biased.


And wave output diagram is given as


Now for negative half cycle:

In this condition, $D_1$ is forward bias and $D_2$ reverse bias. And also the potential drop in this condition is more than the previous one because of less potential drop at $100\Omega$ as compared to $150\Omega$ .

This gives larger potential drop at $V_{AB}$ than previous. So the wave output diagram is given by,


The final output wave:


So, $V_{AB}$ has different peak value during positive and negative half cycle.

Hence, $\left(D\right)$ is the correct answer.