Base ground, emitter and collector positive
Base negative, emitter positive and collector negative
Base positive, emitter negative and collector positive
Base positive, emitter negative and collector negative
To reduce the distortion
To increase the amplification factor
To increase the output voltage gain
To increase the output current gain
As rectifier
For triggering
As an oscillator
For amplification
FET
UJT
DIAC
TRIAC
First quadrant
Third quadrant
Fourth quadrant
Second quadrant