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Q.

In the following circuit  of p-n junction diode  D1,D2  ,D3   are ideal diode, then I is

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a

zero

b

2E3R

c

ER

d

E2R

answer is C.

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Detailed Solution

Diode  D1  is in reverse biased.  So current do not pass through   D1. Diode D3 is in forward bias, which makes this branch act like a conducting wire and shortcircuits the branch D2. So, current flows through D3, then R, then back to battery.   i=ER
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