Question

An n-p-n transistor has three leads A, B and C. Connecting B and C by moist fingers, A to the 10 positive lead to an ammeter , and C to the negitive lead of the ammeter , one find large deflection. Then, A B and C refer respectively to:

• A. Emitter, base and collector
• B. Base, emitter and collector
• C. Base, collector and emitter
• D. Collector , emitter and base

Answer 1

The correct option is A Emitter, base and collector

Leads B & C are joint, so same current flown.

Now, a large deflection between A & b means current gain is

very high, which occure only in Emitten - Base pair.

also in npn transistor, negative of any other instrument (Ammeter here)

in connected to the couector side.

so, $C\to$ couector

$B\to$ Base

$A\to$ Emitter.