Of the diodes shown in the following diagrams, which one is reverse… | NEET 2004 (AIPMT)

Q114NEET 2004 · AIPMTEasy

P-N Junction Diode

Of the diodes shown in the following diagrams, which one is reverse biased?

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Answer: (c)

Reverse bias: cathode (bar side) at higher potential than anode (triangle side).
(a) anode $-5\text{ V}$ , cathode $-12\text{ V}$ : forward. (b) anode $0$ , cathode $-10\text{ V}$ : forward.
(c) anode $0$ , cathode $+5\text{ V}$ : cathode higher, so reverse biased.
(d) anode $+10\text{ V}$ , cathode $+5\text{ V}$ : forward.
So the answer is (c).

P-N Junction Diode question from NEET 2004 (AIPMT)