In a common emitter configuration with suitable bias, it is given than \(R_L\) is the load resistance and \(R_{BE}\)  is small signal dynamic resistance (input side). Then, voltage gain, current gain and power gain are given, respectively, by: [ \(\beta \) is current gain, \(I_B\) , \(I_C\) , \(I_E\) are respectively base, collector and emitter currents]

1. A \(\beta \frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_E}}}{{\Delta {I_B}}},{\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}}\)
2. B \({\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_C}}}{{\Delta {I_B}}},\beta \frac{{{R_L}}}{{{R_{BE}}}}\)
3. C \({\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_C}}}{{\Delta {I_E}}},{\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}}\)
4. D \(\beta \frac{{{R_L}}}{{{R_{BE}}}},\frac{{\Delta {I_C}}}{{\Delta {I_B}}},{\beta ^2}\frac{{{R_L}}}{{{R_{BE}}}}\)