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Un-Answered Questions { Electronics Communications }

Define dynamic resistance of a p-n junction diode in forward biased condition.

1065


Define what is the effect of removal of bypass capacitor in a ce amplifier circuit?

1145


Define what is the main factor for controlling the thermal generation and recombination?

1298


What are ‘emitter injection efficiently’ and ‘base transport factor’ and how do they influence the transistor operation?

1096


In which bands do the movement of electrons and holes take place?

1313


What is intrinsic semiconductor ?

1077


What is meant by led?

1039


Define what is meant by voltage regulation of a dc power supply?

1049


Why silicon type transistors are more often used than germanium type?

1249


Why common-collector circuit is known as an emitter follower?

1103


Define what happens to the conductivity of semiconductor with the rise in temperature? Compare with the conductivity of metals.

1111


Explain what is reverse saturation current?

1153


Why transistor is called current controlled device?

1265


What is the ratio of majority and minority carriers in intrinsic and extrinsic semiconductors?

1198


Define cut-in voltage of a p-n junction diode?

1147