Transistors

Why is a transistor classified as a semiconductor?

It has controlled impurities to vary its conductivity.

Which element is a good material for use as a semiconductor

c. silicon

Substances that enhance the flow of current are called Substances that inhibit the flow of current are known as Substances that neither conduct nor inhibit are called

conductors, insulators, semiconductors

What does the schematic represent?

a NPN transistor

Which materials are present in an NPN transistor?

a p-type semiconductor sandwiched between n-type semiconductor materials.

A NPN transistor is used as a switch in a circuit. What happens when a voltage is applied to the base?

a. Current flows from the collector to the emitter.

Whuch element can be used as a dopant in a p-type semiconductor?

a. gallium

Which process is used to make a semiconductor into a transistor?

b. adding a dopant