Quizzes Flashcards
A PN junction diode acts as a _____ _______ switch?
polarity sensitive
what does rms stand for?
root means square
what would happen if you exceed the PIV rating of a diode?
short circuit
what three significant ratings for rectifier diodes are there? name them
forward current
forward voltage
PIV
What are rectifiers used for?
to convert AC into DC
What is it called when only half of the AC input is converted to undirectional DC?
half-wave reflection
What type of material is used to make diodes?
semi-conductors
What are the two most popular diodes that are used?
silicon
germanium
Atoms arrange theme selves into a unique pattern known as?
crystal lattice
After the doping process is finished it will make 2 different types of semi-conductors. What type of conductors are they now?
P-type
N-type
What is the name given to the negatively charged atom?
Pentavalent
What is the name given to the positively charged atom?
Trivalent
what must we use to limit current in a circuit with a diode? and how is it connected?
Resistor/ connected in series
When using an ohmmeter to test a diode, what would you read if there was a short?
Low
What kind of diode is used for inductive loads? and how is it hooked up?
free wheeling diode/ parallel/ reverse bias
Two different types of rectifiers?
half wave
full wave
what type of diodes do we use when we need to shores large arcing, when they are switched?
freewheeling diodes
There are 3 basic types of electrical materials. Name them?
Conductors, insulators, semi-conductors
How many protons and electrons does a silicon atom have?
14
how many protons and electrons does germanium have?
32
When semi-conductor atoms share their outer valence with other atoms they form a ________-________ structure?
crystal lattice
What is it called when a small amount of impurity is introduced into a semi-conductor to make it a better conductor?
doping
What are the 2 different types of semi-conductor materials that are made after the doping process is complete?
P-type
N-type
A P-type has an excess of?
holes
An N-type has an excess of?
electrons
Semi conductors have a ___________ temperature coefficient of resistance?
negative
The resistance decreases when the temperature __________?
rises
What do we use to try to dissipate the heat of a semi-conductor device?
Aluminum heat sinks
When joining P & N material together a small _______ _________ is formed at the junction?
barrier potential
The small voltage difference is approximately: __________V for silicon and ___________V for germanium
.7
.3
What does PIV stand for?
peak inverse voltage
Positively charged side of diode?
Anode
Negatively charged side of diode?
Cathode
What 3 significant ratings for rectifier diodes are there? Name them.
forward voltage
forward current
PIV
Why do we use rectifiers?
to convert AC into DC
How many diodes for bi-phase?
two
how many diodes for full-wave?
four
how many diodes for half-wave?
one
