In the following circuits PN-junction diodes D 1 , D 2 and D 3 are ideal for the following potential of A and B, the correct increasing order of resistance between A and B will be
(i) – 10 V, – 5V
(ii) – 5V, – 10 V
(iii) – 4V, – 12V
Text Solution
Verified by ExpertsThe correct answer is:
C
(i) V A = –10V and V B = –5V
Diodes D 1 and D 3 are reveres biased and D 2 is forward biased.
.
(ii) When V A = – 5V and V B = – 10V
Diodes D 2 is reverse biased D 1 and D 3 are forward biased
=R.
(iii) In this case equivalent resistance between A and B is also R.
Hence (ii) = (iii) < (i).
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