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 , - 5 V ( ii ) - 5 V , - 10 V ( iii ) - 4 V , - 12 V

Question

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 , - 5 V ( ii ) - 5 V , - 10 V ( iii ) - 4 V , - 12 V, ( i ) ( ii ) ( iii ), ( iii ) ( ii ) ( i ), ( ii ) = ( iii ) ( i ), ( i ) = ( iii ) ( ii )

MARKS App · Accepted Answer

i) In this case of current will flow from B top A. No current will flow through branch C, E (as marked in figure) ⇒ R eq = R 4 + R + R 4 = 3 R 2 ii) Here current will flow from A to B so no current will flow in branch D ⇒ R eq = R 4 + R 2 + R 4 = R iii) Here also current will flow from A to B, so R eq = R same as (ii) ⇒ R ii = R iii i

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