Question

The equivalent resistance of the circuit shown in figure between the points A and B if $V_{A} < V_{B}$ is

• A. $10\Omega$
• B. 20$\Omega$
• C. 5$\Omega$
• D. 40$\Omega$

Answer 1

Answer: (B)

20$\Omega$

Answer 2

: When $V_{A} < V_{B},$ the diode gets reverse biased and offers infinite resistance. No current flows through the upper branch

$\therefore R = 20\Omega$