In the adjacent figure, the potential difference between A and B is

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5 volt

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10 volt

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15 volt

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Solution

The correct option is C 10 volt
It is clear from the flow of current that diode will be in forward biased,

And diode will offer almost zero resistance.

Current through the battery $\frac{30}{10 + 5} = 2 m A$

Current in the two parallel $10 k Ω$ resistors $= 1 A m p s$ .

Potential difference across A and B $= 1 \times 10^{- 3} \times 10 \times 10^{3} = 10 V o l t s$

Option $C$ is the correct answer.

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