Questions

The equivalent resistance between A and B is

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20 ohm if VA>VB

30 ohm ifVA>VB

zero if VA>VB and 50 ohm if VA

zero if VA>VBand 50 ohm if VA

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detailed solution

Correct option is D

If VA>VB all the diodes are in the forward bias so resistance of the circuit is zero.but if VA

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