Question

Why can’t we interchange the emitter and collector even though they are made up of the same type of semiconductor material?​

Answer 1

No, we cannot interchange emitter and collector of a transistor due to following reasons: (i) In a transistor emitter is heavily doped and collector is comparatively lightly doped. (ii) In a transistor, the contract area of emitter- collector junction is larger than that of emitter- base junction