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Question

Question: In the circuit shown if drift current for the diode is 20 \(\mu A,\) the potential difference a cros...

In the circuit shown if drift current for the diode is 20 μA,\mu A, the potential difference a cross the diode is

A

2V

B

4.5V4.5V

C

4 V

D

2.5V2.5V

Answer

4 V

Explanation

Solution

: since the diode is reversed biased, only drift current exists in circuit which is 20μA20\mu A

Potential drop across 15Ω15\Omegaresistor

}{= 300\mu V = 0.0003V}$$ Potential difference across the diode $$= 4 - 0.0003 = 3.99 = 4V$$