Draw a circuit diagram of a transistor amplifier in common emitter configuration
and explain its working in brief.
Solution and Explanation
Step 1: Circuit Diagram of a Transistor Amplifier in Common Emitter Configuration. 
Step 2: Working of Transistor Amplifier in Common Emitter Configuration.
In the common emitter configuration, the input is applied to the base of the transistor, and the output is taken from the collector. The emitter is common to both the input and the output. The signal is amplified as follows:
- The small input signal at the base modulates the base current.
- This results in a large variation in the collector current due to the transistor’s current amplification factor β.
- The amplified output signal is taken across the collector resistor.
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