First slide

Diodes

Question

In a reverse biased diode, when the applied voltage changes by 1V, the current is found to change by 0.5μA. The reverse bias resistance of the diode is

Easy

A

$2 x 10^{5} Ω$
B

$2 x 10^{6} Ω$
C

$200 Ω$
D

$20 Ω$

Solution

Dynamic Resistance
$R = \frac{Δ V}{Δ I} = \frac{1}{0.5 \times 10^{- 6}} = 2 \times 10^{6} Ω$

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