Question

In a Bipolar Junction Transistor $(BJT)$ , the current gain $\beta$ is defined is

• A. the ratio of change in collector current to the change in emitter current for a constant collector voltage in the common base configuration
• B. the ratio of change in emitter current to the change in base current for constant emitter voltage in common emitter configuration
• C. the ratio of change in collector current to the change in base current for constant collector voltage in collector emitter configuration
• D. the ratio of change in base current to the change in collector current for constant collector voltage in collector emitter configuration

Answer 1

Answer: (B)

the ratio of change in emitter current to the change in base current for constant emitter voltage in common emitter configuration

Answer 2

In a Bipolar Junction Transistor $(BJT)$, the current gain $\beta$ is defined as the ratio of change in collector current to change in base current for constant collector voltage in collector-emiitter configuration
i.e., $\beta = \frac{\Delta I_c}{\Delta I_B}$