Question

What is the expression for the Current Amplification factor?

(a) \(\frac{\Delta I_c}{\Delta V_c}\)

(b) \(\frac{\Delta V_c}{\Delta I_c}\)

(c) \((\frac{\Delta I_C}{\Delta I_B})_{V_{CE}}\)

(d) \((\frac{\Delta I_C}{\Delta I_B})_{V_{BE}}\)

I had been asked this question in exam.

This interesting question is from Transistors in portion Semiconductors of Engineering Physics II

Answer 1

The correct option is (c) \((\frac{\Delta I_C}{\Delta I_B})_{V_{CE}}\)

To elaborate: Amplification factor can be defined as the ratio of the change in collector current to the change in base current at a constant collector-emitter voltage when the transistor is in active state. The correct expression for the amplification factor is: \((\frac{\Delta I_C}{\Delta I_B})_{V_{CE}}\).