Semiconductors

JEE Main level, numerical answer, medium

72 of 209

Question 72 of 209

For the forward biased diode characteristics shown in the figure, the dynamic resistance at ID=3mA{I}_{D}=3mA will be ________Ω.\Omega .

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Answer: 25

Rd=dVdi=1(didv)=1(5−1×10−30.75−0.65){R}_{d}=\dfrac{dV}{di}=\dfrac{1}{\left(\dfrac{di}{dv}\right)}=\dfrac{1}{\left(\dfrac{5-1\times {10}^{-3}}{0.75-0.65}\right)}
1004=25Ω\dfrac{100}{4}=25\Omega

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