Question

Draw the circuit diagram to determine the characteristics of a pnp transistor in common emitter configuration.

Explain, using I-V characteristics, how the collector current changes with the base current. How can (i) output resistance and (ii) current amplification factor be determined from the IV characteristics?

Answer 1

"Below circuit diagram illustrate about the key characteristics of a p-n-p transistor in common emitter configuration

I-V characteristics are drawn by plotting current in the Y-axis and Voltage in the X-axis.

Output resistance:

This is the ratio of collector emitter voltage to the change in collector current that is having a constant current base.

R =V/Ic*Ib

Current amplification factor:

This is defined as the ration of change in the collector change to the change in the base current.

Amplification factor = IC/Ib"

Answer 2

"Given:  

PNP Transistor in CE (Common Emitter configuration)

Solution:

I-V characteristics are drawn by plotting current in the Y-axis and voltage in the X-axis.

Output resistance:

The output resistance is directly propotional to the collector emitter voltage and irsely propotional to the collector current change that is having a constant current base.

$R = \frac{V}{I_{C}} \times I_{B}$

Current amplification factor:

It usually defined as the ratio of collector current and the base current .

Amplification factor $= \frac{I_{C}}{I_{B}}$"