JEE Main · 2006 · 30 Apr 2006 · Offline · Semiconductors

The circuit has two oppositely connect ideal diodes in parallel. What is the current following in the circuit?

(A)1.33 A
(B)1.71 A
(C)2.00 A✓ Correct
(D)2.31 A

Answer: (C)

Solution

The two ideal diodes are connected the opposite way round, so for the given battery polarity one of them is forward biased and conducts while the other is reverse biased and acts as an open circuit. Current is therefore confined to the single conducting branch. With the blocked branch removed, the resistances left in the conducting path add up to

6 Ω

across the

12 V

supply, giving

I = \frac{12}{6} = 2.00 A

JEE Main · 2006 · 30 Apr 2006 · Offline · Single correct option

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