How do I calculate the AC alpha, AC beta, voltage gain and power gain of acommon emitter transistor amplifier?

Question

A common-emitter transistor amplifier has a base current change of 15 microamperes and a collector current change of 200 microamperes. The load resistance is 50000 ohms with an input resistance of 1000 ohms.

Calculate the AC alpha, AC beta, AC voltage gain and power gain of this circuit.

Answer 1

Beta = delta(Ic) / delta(Ib) = 200/15 = 13.33.
Alpha = Beta / (Beta + 1) = 13.33 / 14.33.
Voltage gain = Rc * delta(Ic) / Rb * delta(Ib) = 13.33 * 50.
Power gain = Beta * Voltage gain = 13.33^2 * 50.
See the ref.

Answer 2

Ac Beta