ITEC 320 Test #2 Flashcards Preview

Module 4, Lesson 3 > ITEC 320 Test #2 > Flashcards

Flashcards in ITEC 320 Test #2 Deck (107)
Loading flashcards...
1

Transistor

A solid-state device made of semiconductor material such as silicon or germanium.

2

Types of transistors

NPN and PNP

3

Three elements of a transistor

Base, emitter, and collector

4

Base

Inner element of a transistor. The base controls transistor action.

5

What material is the base made out of in a NPN transistor

P material

6

What material is the base made out of in a PNP transistor

N material

7

Emitter

On of the outer elements of the transistor

8

What material is the emitter made out of in a NPN transistor

N material

9

What material is the emitter made out of in a PNP transistor

P material

10

Collector

One of the other outer elements of a transistor

11

What material is the collector made out of in a NPN transistor

N material

12

What material is the collector made out of in a PNP transistor

P material

13

NPN transistor

A bipolar transistor in which outer elements (emitter and collector) are made of N-type of semiconductor material and the inner element (base) is made out of P-type material

14

PNP transistor

A bipolar transistor in which the outer elements (emitter and collector) are made out of P-type semiconductor material and the inner element (base) is made out of N-type material

15

P-type material

Semiconductor material that is doped with very small amounts of acceptor impurity materials that decrease active electrons.

16

What are the majority charge carriers in P-type materials

Holes

17

N-type material

Semiconductor material that is doped with very small amounts of donor impurity materials that add active electrons.

18

What are the majority charge carriers in N-type materials

Electrons

19

What are 2 basic transistor types

NPN and PNP

20

How many elements does a transistor have

3 (base , emitter, and collector)

21

In the transistor schematic symbol, the arrow is on what element

Emitter

22

What is the most common problem with transistors

Overheating

23

What can you use in place of a transistor tester to check transistors

Ohmmeter

24

When reverse biased, a diode will block, pass current

Block

25

When forward biased, a diode will block, pass current

Pass

26

When testing transistors, consider them to be

Back-to-back diodes

27

A diode that is forward biased will have high, low resistance

Low

28

A diode that is reverse biased will have high, infinity resistance

Infinity

29

To test transistors to determine if they are NPN or PNP, what must you know about the ohmmeter

The negative and positive leads

30

The positive probe is on what material when a diode is reverse biased

Cathode (-)