Which one of the operations of n-p-n transistor differs from that of p-n-p transistor? (a) The emitter-base junction is reversed biased in n-p-n transistor. (b) The emitter injects minority carriers into the base region of the p-n-p transistor. (c) The emitter injects holes into the base of the p-n-p transistor and electrons into the base region of n-p-n transistor. (d) The emitter injects holes into the base of n-p-n transistor.

Answer: (c). In both transistors the emitter-base junction is forward biased and the emitter injects majority carriers of the emitter, which are minority carriers in the base. p-n-p: p-type emitter injects holes into the n-type base. n-p-n: n-type emitter injects electrons into the p-type base. So the answer is (c).

Which one of the operations of n-p-n transistor differs from that of… | MHT CET 2023 (10 May, Shift 2)

Q46MHT CET 2023 · 10 MAY · SHIFT 2Medium

Junction Transistor

Which one of the operations of $\mathrm{n}-\mathrm{p}-\mathrm{n}$ transistor differs from that of $p-n-p$ transistor?

Show answer and solution

Answer: (c)

In both transistors the emitter-base junction is forward biased and the emitter injects majority carriers of the emitter, which are minority carriers in the base.
p-n-p: p-type emitter injects holes into the n-type base.
n-p-n: n-type emitter injects electrons into the p-type base.
So the answer is (c).

Report a mistake

Junction Transistor question from MHT CET 2023 (10 May, Shift 2)

More questions on Junction Transistor