First slide

P-N junction diode

Question

In the given circuit, the voltage drop across $6 Ω$ resistor is

Moderate

A

12 V
B

8 V
C

4 V
D

9 V

Solution

Diodes $D_{2}$ and $D_{3}$ will conduct as they are forward biased, $D_{1}$ will not conduct as it is reverse biased.
$∴ I = \frac{12}{3 + 6} A = \frac{4}{3} A$ $∴ Δ V = 6 \times \frac{4}{3} V = 8 V$

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