Quizzes

Question 1

A PN junction diode acts as a _____ _______ switch?

Answer 1

polarity sensitive

Question 2

what does rms stand for?

Answer 2

root means square

Question 3

what would happen if you exceed the PIV rating of a diode?

Answer 3

short circuit

Question 4

what three significant ratings for rectifier diodes are there? name them

Answer 4

forward current
forward voltage
PIV

Question 5

What are rectifiers used for?

Answer 5

to convert AC into DC

Question 6

What is it called when only half of the AC input is converted to undirectional DC?

Answer 6

half-wave reflection

Question 7

What type of material is used to make diodes?

Answer 7

semi-conductors

Question 8

What are the two most popular diodes that are used?

Answer 8

silicon

germanium

Question 9

Atoms arrange theme selves into a unique pattern known as?

Answer 9

crystal lattice

Question 10

After the doping process is finished it will make 2 different types of semi-conductors. What type of conductors are they now?

Answer 10

P-type

N-type

Question 11

What is the name given to the negatively charged atom?

Answer 11

Pentavalent

Question 12

What is the name given to the positively charged atom?

Answer 12

Trivalent

Question 13

what must we use to limit current in a circuit with a diode? and how is it connected?

Answer 13

Resistor/ connected in series

Question 14

When using an ohmmeter to test a diode, what would you read if there was a short?

Answer 14

Low

Question 15

What kind of diode is used for inductive loads? and how is it hooked up?

Answer 15

free wheeling diode/ parallel/ reverse bias

Question 16

Two different types of rectifiers?

Answer 16

half wave

full wave

Question 17

what type of diodes do we use when we need to shores large arcing, when they are switched?

Answer 17

freewheeling diodes

Question 18

There are 3 basic types of electrical materials. Name them?

Answer 18

Conductors, insulators, semi-conductors

Question 19

How many protons and electrons does a silicon atom have?

Answer 19

14

Question 20

how many protons and electrons does germanium have?

Answer 20

32

Question 21

When semi-conductor atoms share their outer valence with other atoms they form a ________-________ structure?

Answer 21

crystal lattice

Question 22

What is it called when a small amount of impurity is introduced into a semi-conductor to make it a better conductor?

Answer 22

doping

Question 23

What are the 2 different types of semi-conductor materials that are made after the doping process is complete?

Answer 23

P-type

N-type

Question 24

A P-type has an excess of?

Answer 24

holes

Question 25

An N-type has an excess of?

Answer 25

electrons

Question 26

Semi conductors have a ___________ temperature coefficient of resistance?

Answer 26

negative

Question 27

The resistance decreases when the temperature __________?

Answer 27

rises

Question 28

What do we use to try to dissipate the heat of a semi-conductor device?

Answer 28

Aluminum heat sinks

Question 29

When joining P & N material together a small _______ _________ is formed at the junction?

Answer 29

barrier potential

Question 30

The small voltage difference is approximately: __________V for silicon and ___________V for germanium

Answer 30

.7

.3

Question 31

What does PIV stand for?

Answer 31

peak inverse voltage

Question 32

Positively charged side of diode?

Answer 32

Anode

Question 33

Negatively charged side of diode?

Answer 33

Cathode

Question 34

What 3 significant ratings for rectifier diodes are there? Name them.

Answer 34

forward voltage
forward current
PIV

Question 35

Why do we use rectifiers?

Answer 35

to convert AC into DC

Question 36

How many diodes for bi-phase?

Answer 36

two

Question 37

how many diodes for full-wave?

Answer 37

four

Question 38

how many diodes for half-wave?

Answer 38

one