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A diode having potential difference 0.5 V across its junction which does not depend on current is connected in series with resistance of $20 Ω$ across source. If 0.1 A passes through resistance, then what is the voltage of the source?

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1.5 V

2.0 V

2.5 V

5.0 V

answer is C.

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Detailed Solution

$V' = V + I R = 0.5 + 0.1 \times 20 = 2.5 V$

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