(A) The current gain of a $\text{BJT}$ will be increased if
(B) The current gain of a $\text{BJT}$ will be reduced if
(C) The break-down voltage of a $\text{BJT}$ will be reduced if
- The collector doping concentration is increased.
- The base width is reduced.
- The emitter doping concentration to base doping concentration ratio is reduced.
- The base doping concentration is increased keeping the ratio of the emitter doping concentration to base doping concentration, constant.
- The collector doping concentration is reduced.