unit 2 ADC

In which region a transistor acts as an open switch?

• cut off region

• inverted region

• active region

• saturated region

In which region a transistor acts as a closed switch?

• cut off region

• inverted region

• active region

• saturated region

The current which is helpful for LED to turn on in a transistor as switch _________

• emitter current

• depends on bias

• base current

• collector current

Which of the following statements is true?

• Solid state switches are applications for an AC output

• LED’s can be driven by transistor logics

• Only NPN transistor can be used as a switch

• Transistor operates as a switch only in active region

The technique used to quickly switch off a transistor is by_________

• reverse biasing its emitter to collector junction

• reverse biasing its base to collector junction

• reverse biasing its base to emitter junction

• reverse biasing any junction

A PNP transistor the base region is made of ____

• P and N type

• P type semiconductor

• N type semiconductor

• None

The base emitter voltage in a cut off region is _________

• greater than 0.7V

• equal to 0.7V

• less than 0.7V

• cannot be predicted