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  • The characteristic of a <img alt="\mathrm{P-N}" src="https://entrancecorner.oncodecogs.com/gif.la

The \mathrm{i-V} characteristic of a \mathrm{P-N} junction diode is shown below. The approximate dynamic resistance of the \mathrm{P-N} junction when a forward bias of 2volt is applied\

Option: 1

1 \Omega


Option: 2

0.25 \Omega


Option: 3

0.5 \Omega


Option: 4

5 \Omega


Answers (1)

best_answer

The current at \mathrm{2V} is \mathrm{400\ mA} and at \mathrm{2.1 V} it is \mathrm{800\ mA}. The dynamic resistance in this region
\mathrm{R=\frac{\Delta V}{\Delta i}=\frac{(2.1-2)}{(800-400) \times 10^{-3}}=\frac{1}{4}=0.25 \Omega}

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