JEE Main 2025 Jan 22 Shift 1, Physics Q18: Semiconductors, p-n Junction Diode and Applications

JEE Main2025Jan 22, Shift 1Physics

Which of the following circuits represents a forward biased diode ?

Solution

$ \text{For an ideal diode, it is forward biased when }V_{\text{anode}}>V_{\text{cathode}}. $

Option	Anode Voltage	Cathode Voltage	Condition	Result
(A)	$- 10 V$	$0 V$	$-10<0$	Reverse biased
(B)	$- 10 V$	$- 15 V$	$- 10 > - 15$	Forward biased
(C)	$4 V$	$2 V$	$4 > 2$	Forward biased
(D)	$- 10 V$	$- 5 V$	$-10<-5$	Reverse biased
(E)	$2 V$	$0 V$	$2 > 0$	Forward biased

$ \boxed{\text{Forward biased diodes are }(B),\ (C)\text{ and }(E).} $

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