MHT CET · Physics · Semiconductors

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 \(\mathrm{n}-\mathrm{p}-\mathrm{n}\) 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 \(\mathrm{p}-\mathrm{n}-\mathrm{p}\) transistor and electrons into the base region of \(n-p-n\) transistor.
D The emitter injects holes into the base of \(\mathrm{n}-\mathrm{p}-\mathrm{n}\) transistor.

Verified Solution

Answer & Solution

Correct Answer

(C) The emitter injects holes into the base of the \(\mathrm{p}-\mathrm{n}-\mathrm{p}\) transistor and electrons into the base region of \(n-p-n\) transistor.

Step-by-step Solution

Detailed explanation

Std. \(12 \mid\) Ch-16 | Subtopic-16.4

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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