Transistor Basics Worksheet

A transistor is a ______ controlled device.

• Voltage

• Current

• Power

• Resistance

The transistor consists of how many semiconductor layers?

• One

• Two

• Three

• Four

In an NPN transistor, the majority charge carriers are:

• Holes

• Electrons

• Both

• None

In a PNP transistor, the direction of conventional current is:

• From emitter to base

• From base to emitter

• From collector to emitter

• From emitter to collector

The emitter of a transistor is:

• Lightly doped and small area

• Heavily doped and large area

• Moderately doped and large area

• Lightly doped and large area

The transistor operates in the active region when:

• Both junctions forward-biased

• Both junctions reverse-biased

• Emitter-base forward and collector-base reverse

• Emitter-base reverse and collector-base forward

The relation among transistor currents is:

• IC = IE + IB

• IE = IC + IB

In CB configuration, current gain (α) is given by:

• IC / IE

• IE / IC

• IB / IE

• IC / IB

In CE configuration, current gain (β) is given by:

• IC / IB

• IE / IC

• IB / IC

• IC / IE

The relation between α and β is:

• β = α / (1 − α)

• β = α × (1 − α)

• β = (1 − α) / α

• β = 1 / α