Transistor Current Flow Quiz

What is the symbol used to denote the base current in a transistor?

• I sub t

• I sub b

• I sub c

• I sub e

Which current is the sum of the base and collector currents in a transistor?

• Emitter current

• Base current

• Collector current

• Total current

Why is the emitter current always the highest among the three currents in a transistor?

• Because it is the only current that exits the transistor

• Because it flows through the base

• Because it is the smallest current

• Because it is the sum of the base and collector currents

What percentage of electrons typically pass through the base to the collector?

• 50%

• 100%

• 10%

• 90% or more

Why is the collector current greater than the base current?

• Because the collector is smaller

• Because the base is thin and lightly doped

• Because the base is thick and heavily doped

• Because the base current is zero

Which current relationship is important for objective questions?

• IB = IE + IC

• IC = IE + IB

• IE = IB + IC

• IE = IC - IB

What happens to electrons that do not fall into holes in the base?

• They are absorbed by the base

• They pass through to the collector

• They are lost as heat

• They return to the emitter

How many electrons out of 1,000 typically fall into holes in the base?

• 800 to 900

• 500 to 600

• 100 to 200

• 10 to 20

What is the primary reason for the higher collector current compared to the base current?

• The emitter is smaller

• The base is very thin and lightly doped

• The base current is zero

• The collector is larger

What is the relationship between IE, IC, and IB?

• IE = IC - IB

• IE = IB + IC

• IB = IE + IC

• IC = IE + IB