Question

What is meant by the current gain (\(\beta\)) of a transistor?

Hint:

The current gain (\(\beta\)) is a key parameter in transistor amplifiers as it shows how much the input current is amplified.

Answer 1

The current gain (\(\beta\)) of a transistor is the ratio of the output current (collector current) to the input current (base current) in a transistor. It is a measure of how much the transistor amplifies the input current.
Mathematically, \[ \beta = \frac{I_C}{I_B} \] where: - \(I_C\) is the collector current,
- \(I_B\) is the base current.
The value of \(\beta\) depends on the type of transistor (NPN or PNP) and its material properties. It is typically a large number, ranging from 20 to 1000, which means that a small input current can generate a large output current.