In the given figure, a diode D is connected to an external

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In the given figure, a diode D is connected to an external resistance R = 100 Ω and an e.m.f. of 3.5 V. If the barrier potential developed across the diode is 0.5 V, the current in the circuit will be:

1. 40 mA
2. 20 mA
3. 35 mA
4. 30 mA

Correct Option: D

Current I =	V	and β	(3.5 - 0.5)	A
	R		100

[ ∵ Barrier potential V_B = 0.5V]

=	3	= 30 mA
	100