A p-n junction diode can withstand currents upto 10 mA under forward bias, diode has a potential difference of 0.5 V across it which is assumed to be independent of current. What is the maximum voltage of the battery used to forward bias the diode when a resistance of 200 ohm is connected in series with it.

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2.5 V

4 V.

5 V.

1.25V.

answer is A.

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Detailed Solution

potential difference across the resistance is 10×10-3×200=2 Vpotential across the diode is 0.5Vso total potential difference battery can give 2.5 V

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