The equivalent resistance of the circuit shown in figure between the points A and B if VA VB is

Question

The equivalent resistance of the circuit shown in figure between the points A and B if VA < VB is , the equivalent resistance between the points A and B, if VA > VB is (A) 10 Ω (B) 20 Ω (C) 30 Ω (D) 15 Ω

Tardigrade Admin · Accepted Answer

When VA > VB the diode gets forward biased and offers no resistance. ∴ R = (20× 20/20 + 20) = 10 Ω

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

$10 Ω$

$20 Ω$

$30 Ω$

$15 Ω$

When $V_{A} > V_{B}$ the diode gets forward biased and offers no resistance.
$∴ R = \frac{20 \times 20}{20 + 20} = 10 Ω$

Q. The equivalent resistance of the circuit shown in figure between the points A and B if VA​<VB​ is , the equivalent resistance between the points A and B, if VA​>VB​ is

10Ω

20Ω

30Ω

15Ω