Draw the labelled circuit diagram of a common-emitter transistor amplifier : Explain clearly how the input and output signals are in opposite phase.

Explanation

### Step-by-Step Solution:

1. **Draw the Circuit Diagram**:
- Begin by sketching the circuit diagram of a common-emitter transistor amplifier.
- Include the following components:
- An NPN transistor with labeled terminals: Collector (C), Base (B), and Emitter (E).
- A DC power supply connected to the collector through a resistor (Rc).
- A resistor (Rb) connected to the base for biasing.
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