The current gain of a transistor in common emitter circuit is 49. Calculate its common base current gain. Find the base current when emitter current is 3 mA.

Explanation

To solve the given problem, we will break it down into two parts as outlined in the question:

1. Calculate the common base current gain (α).
2. Find the base current (IB) when the emitter current (IE) is 3 mA.

### Step 1: Calculate the Common Base Current Gain (α)

1. **Given**: The current gain of the transistor in a common emitter circuit (β) is 49.
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