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Q.

Assuming the diodes to be of silicon with forward resistance zero, the current I in the following circuit is

(Barrier potential of Si diode = 0.7 V)

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a

9.65 mA

b

10.36 mA

c

0

d

10 mA

answer is B.

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Detailed Solution

Total resistance in thecircuit = 2 kΩ

            E = 20V, barrier potential of Si diode = 0.7 V.

Question Image

Question Image The current = 20−0.72000 = 9.65 mA

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Assuming the diodes to be of silicon with forward resistance zero, the current I in the following circuit is(Barrier potential of Si diode = 0.7 V)