First slide

P-N junction diode

Question

The equivalent resistance between A and B in ohm is $(V_{A} > V_{B})$

Moderate

A

3
B

9
C

4.5
D

18

Solution

Here the diode is in reversed bias as $(V_{A} > V_{B})$ potential drop across the 3 ohm resistance is less than potential drop across 6 ohm resistance. So resistance of each branch is 9 ohm and equivalent resistance is 9||9 = 4.5 ohm

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