JEE MAIN - Physics (2021 - 20th July Evening Shift - No. 23)
For the forward biased diode characteristics shown in the figure, the dynamic resistance at ID = 3 mA will be __________ $$\Omega$$.
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Answer
25
Explanation
$${R_d} = {{dV} \over {di}} = {1 \over {{{di} \over {dv}}}} = {1 \over {{{5 - 1 \times {{10}^{ - 3}}} \over {0.75 - 0.65}}}}$$
$$ = {{100} \over 4} = 25\Omega $$
$$ = {{100} \over 4} = 25\Omega $$
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