A) \[\alpha \]
B) \[\frac{\beta }{\alpha }\]
C) \[\beta \times \beta \]
D) \[\beta \]
Correct Answer: D
Solution :
In a common-emitter configuration, the voltage gain is defined as the ratio of change in the output voltage to the change in input voltage. \[{{A}_{V}}=\beta \times \]resistance gain ... (i) Also, power gain is defined as the ratio of the change in the output power to the change in r input power. \[{{A}_{P}}={{\beta }^{2}}\times \]resistance gain ... (ii) Dividing Eq. (ii) by Eq. (i), we get \[\frac{{{A}_{p}}}{{{A}_{V}}}=\beta \]
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