P-N Junction Diode question from JEE Main 2024 (27 Jan, Shift 1)

Answer: (d)

1. Reverse bias: cathode potential $>$ anode potential.
2. (a) anode $+2\text{ V}$, cathode $-10\text{ V}$: forward. (b) anode $0$, cathode $-5\text{ V}$: forward. (c) anode $+2\text{ V}$, cathode $0$: forward.
3. (d) anode $+2\text{ V}$, cathode $+4\text{ V}$: cathode higher, so reverse biased.
4. So the answer is (d).