Derive relation between current gain in common base and common-emitter transistor amplifiers.

Explanation

To derive the relation between the current gain in common base (α) and common emitter (β) transistor amplifiers, we can follow these steps:

### Step 1: Define Current Gains
In a common base transistor amplifier, the current gain (α) is defined as the ratio of the collector current (I_C) to the emitter current (I_E):
\[ \alpha = \frac{I_C}{I_E} \quad \text{(Equation 1)} \]

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