Question

Two ideal junction diodes $D_{1}, D_{2}$ are connected as shown in the figure. A $3 V$ battery is connected between $A$ and B. The current supplied by the battery if its positive terminal is connected to $A$ is

• A. 0.1A
• B. 0.3 A
• C. 0.9 A
• D. 90 A

Answer 1

Answer: (B)

If positive terminal is connected to $A , D _{1}$ is in forward bias and $D _{2}$ is in reverse bias. So $20 W$ is ineffective.
$\therefore i=\frac{V}{R}=\frac{3}{10}=0.3 A$