Assuming that the silicon diode having r

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Target Exam

CUET

Subject

Physics

Chapter

Semiconductors and Electronic Devices

Question:

Assuming that the silicon diode having resistance of 20 Ω, the current through the diode is (knee voltage 0.7 V)

Options:

0 mA

10 mA

6.5 mA

13.5 mA

Correct Answer:

6.5 mA

Explanation:

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)

$∴I=\frac{1.3}{200}=6.5mA$