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Capacitance of a Random Conductor

A silicon dio...

Question

A silicon diode which has a knee voltage of 0.7 V & negligible forward resistance has a pd across it as shown. Then the current through the diode is

A

30 mA

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B

70 mA

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C

2.3 mA

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D

23 mA

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Solution

The correct option is D
23 mA

v=3v $v_{K} = 0.7 v ∴ v_{R} = 3 - 0.7 = 2.3 v$

$∴ I = \frac{2.3}{100} = 23 m A$

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