Which one of the operations of n - p - n transistor differs from that of p - n - p transistor?
1
The emitter-base junction is reversed biased in n − p − n transistor.
2
The emitter injects minority carriers into the base region of the p - n - p transistor.
3
The emitter injects holes into the base of the p - n - p transistor and electrons into the base region of n - p - n transistor.
4
The emitter injects holes into the base of n - p - n transistor.