Name: Energy Band Gap
Uploaded: 2019-07-19
Duration: 5 min 21 s
Description: We know that certain materials conduct electricity whereas some don’t. Has it got anything to do with their energy bandgap? Let’s find out in this video.

Question

Draw a circuit for drawing the characteristic curve of a

p

-

n

-

p

transistor for common emitter mode and explain the curve obtained.

Accepted Answer

Common emitter characteristics: The common emitter characteristics are the graphs drawn between appropriate voltages and currents for a transistor when its emitter is taken as the common terminal and grounded (zero potential), base is the input terminal and collector is the output terminal. The emitter-base junction is forward biased by means of battery $V_{BB}$ Through rheostat ${Rh}_{1}$ . The emitter circuit is reverse biased by means of battery $V_{CC}$ Through rheostat ${Rh}_{2}$ . The base-emitter voltage $V_{BE}$ And the collector-emitter-voltage $V_{CE}$ Are measured by high resistance voltmeters. The base current $I_{B}$ . Is measured by a micro ammeter and the collector current. $I_{C}$ by a mil ammeter

Input Characteristic: A graph showing the variation of base current $I_{B}$ with base-emitter voltage $V_{BE}$ at constant collector-emitter voltage $V_{CE}$ is called the input characteristic of the transistor. Two such curves for two different collector-emitter voltages have been plotted in fig.

Output characteristic: A graph showing the variation of collector current $I_{C}$ with collector-emitter voltage $V_{CE}$ at constant base-current $I_{B}$ the output characteristic of the transistor. Fig. shows such curves for different values of $I_{B}$

The possible value of common base current amplification factor α of a transistor is $0.9$

Draw a circuit for drawing the characteristic curve of a $p$ - $n$ - $p$ transistor for common emitter mode and explain the curve obtained.

Important Questions on Electronic Devices

Learn and Prepare for any exam you want !

Draw a circuit for drawing the characteristic curve of a p-n- p transistor for common emitter mode and explain the curve obtained.

Important Questions on Electronic Devices

Learn and Prepare for any exam you want !

Draw a circuit for drawing the characteristic curve of a $p$ - $n$ - $p$ transistor for common emitter mode and explain the curve obtained.