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Question

Find the equivalent resistance of the network shown in figure (45-E8) between the points A and B.

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Solution

Let the potential at A and B be VA and VB respectively.

(i) If VA > VB

Then current flows from A to B and the diode is in forward biased.

Equivalent Resistance = 102=5 Ω

(ii) If VA < VB

The current flows from B to A and the diode is reverse biased.

Hence Equivalent Resistance = 10 Ω


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