In the shown network, ideal diodes D₁, D₂ and D₃ connect A and B through resistors. For the three applied potential pairs (i) A = -10 V, B = -5 V; (ii) A = -5 V, B = -10 V; (iii) A = -4 V, B = -12 V, find the increasing order of equivalent resistance between A and B. Image
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Question

In the shown network, ideal diodes D₁, D₂ and D₃ connect A and B through resistors. For the three applied potential pairs (i) A = -10 V, B = -5 V; (ii) A = -5 V, B = -10 V; (iii) A = -4 V, B = -12 V, find the increasing order of equivalent resistance between A and B. Image

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G1 Physics · Accepted Answer

For each applied pair, determine which ideal diodes are forward biased, replace ON diodes by shorts and OFF diodes by opens, then calculate the A-B resistance. The increasing order obtained is (ii)=(iii)<(i). Correct answer: C.

In the shown network, ideal diodes D₁, D₂ and D₃ connect A and B through resistors. For the three applied potential pairs (i) A = −10 V, B = −5 V; (ii) A = −5 V, B = −10 V; (iii) A = −4 V, B = −12 V, find the increasing order of equivalent resistance between A and B. Image