Question
Draw a circuit diagram of a C.E. transistor amplifier. Briefly, explain its working and write the expression for (i) current gain, (ii) voltage gain of the amplifier.
✓
Answer
The input signal, connected between the emitter and base, along with the forward bias, causes corresponding large changes in output voltage across R.
Current gain $\beta_{ac} = \bigg|\frac{\Delta\text{I}_{c}}{\Delta\text{I}_{B}}\bigg|$
Voltage gain $\text{V}_{Gain} = \frac{\Delta\text{V}_{o}}{\Delta\text{V}_{I}}.$
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