Question

Define the following terms:
(i) Input resistance.
(ii) Current amplification factor, b of a transistor used in its CE configuration.

Answer 1

#The input resistance is the resistance seen by the current source or voltage source which drives the circuit.
#Current Amplification Factor (γ) Theratio of change in emitter current (ΔIE) to the change in base current (ΔIB) is known as Current Amplification factorin common collector (CC)configuration. It is denoted by γ. The current gain in CC configuration is same as in CE configuration.