MHT CET Physics question
Not in JEE Advanced syllabus
A p-n junction diode when forward biased has a drop of 0.4 V which is assumed to be independent of current. A current excess of 10 mA through the diode damages (burns) the diode. If we want to use a 2 V battery to forward bias the diode, what should be the value of resistor used in series with the diode so that the maximum current does not exceed 5 mA?
Answer: (D)
Solution
The series resistor is R = (voltage across the resistor)/(maximum current) with the maximum current 5 mA, so R =
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