Assuming that the silicon diode having resistance of 20 Ω, the current through the diode is (knee voltage 0.7 V)
Answer & explanation
Correct answer: option 3
Here diode is forward biased with voltage = 2 – 0 = 2V.
$V_B = V_{knee} + IR$
2 = 0.7 + I × 200
(∴ Total resistance = 180 + 20 = 200 Ω)
$∴I=\frac{1.3}{200}=6.5mA$