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Q.

A P-N junction diode can withstand currents up to 10 mA. Under forward bias, the diode has a potential drop of 0.5 V across it which is assumed to be independent of current. The maximum voltage of the battery used to forward bias the diode when a resistance 200 Ω of is connected in series with it is 

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a

2.5 V

b

2.6 V

c

2.7 V

d

2.8 V

answer is A.

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Detailed Solution

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i=EVbR

E=0.01×200+0.50.01=2.5 V

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