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Q.

In the circuit figure treat the diode as a ideal .  Then current in the 8Ω     resistor is

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a

40 A

b

5 A

c

2 A

d

7 A

answer is C.

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Detailed Solution

With battery polarity, D1 is in forward bias and  D2  is in  reverse bias.      So   , 4Ω and 8Ω are in series. As per Ohm's Law, I=244+8=2A 

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