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Q.

In the circuit shown, the diodes X and Y are ideal and a battery of 10 V can be connected between the terminals A and B. The minimum and maximum currents sent by the battery will be respectively

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a

0.4A, 0.1A

b

0.1A, 0.4 A

c

1/9 A, 2/3 A

d

2/3 A, 1/9 A 

answer is B.

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Detailed Solution

When A is +ve and B is –ve, no current will flow in the branch containing Y. The current now will be 10/(10+90) =0.1A. 
In the second case with A –ve and B +ve, no current in branch containing X. The current now will be 10/(10+15)=0.4A

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