Transistors

Question 1

Where do electrons flow in the BJT NPN transistor? (TTL)

Answer 1

Electrons flow from the emitter to the collector (Current goes the opposite way)

Question 2

Where do electrons flow in the BJT PNP transistor? (TTL)

Answer 2

From the collector to the emitter (current flows the opposite way)

Question 3

Where do electrons flow in the FET N-channel transistor? (CMOS)

Answer 3

Electrons flow from source to drain

Question 4

Where do electrons flow in FET P-channel transistors? (CMOS)

Answer 4

Electrons flow from the drain to the source

Question 5

Transistors are used as switches. What are the two states they can be in?

Answer 5

1. Cut off

No current
Open circuit

2. Saturation

All current flows
Short circuit

Question 6

In a transistor, what does the the Base, collector and Emitter do?

Answer 6

Base = To pass charge carriers between the Emitter/collector

Collector/Emitter= Collects/emits charge carriers by acting as a +ve or -ve terminal

Question 7

How can a transistor amplify the signal strength?

Answer 7

By attaching a resistor, the voltage can be amplified from for example 0.1V to 5V through changing the current flowing through the resistor