Define current amplification factor in a common emitter mode of transistor.
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### Step-by-Step Solution:
1. **Understanding the Transistor Configuration**:
- In a common emitter configuration, the emitter terminal of the transistor is common to both the input and output circuits. The input is applied between the base and emitter, while the output is taken from the collector and emitter.
2. **Identifying the Parameters**:
- In this configuration, we have three main terminals: the emitter (E), the base (B), and the collector (C).
- The collector current (IC) is the current flowing through the collector terminal, and the base current (IB) is the current flowing into the base terminal.
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