Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ELX > Final Test Cards > Flashcards

Final Test Cards Flashcards

1
Q

How does a Zener diode work

A

Has to be reverse bias
And have a lower voltage then the source

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

List 6 method used to produce electricity

A

Piezoe electric -pressure
Tribo electric- friction
Photo voltaic - light
Magneto electric- magnetism
Thermol electric- heat
Electro chemical- chemical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How many electrons would you find in the following valence shells?
Semi conductor
Conductor
Insulator

A

Semi conductor - 4
Conductor 1-3
Insulator 5-8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is meant by the term line drop?

A

Voltage drop caused by resistance in the conductor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is meant by the term line loss?

A

Power loss caused by resistance of the conducter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Explain Kirchoff’s current law?

A

Current in equals current out

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Explain Kirchoff voltage law

A

Algebraic sum of all voltages in a close loop is equal to zero 

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

List 3 forms of ohms law

A

E=IR
I=E/R
R=E/I

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

List 3 forms of power loss

A

P=IE
P=I2•R
P=E2•R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Volts are the flow of electrons
true or false

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

List 3 advantages of Edison 3 wire circuits

A

1 ( Less conductor material is required )
2 ( 2 different voltages available )
3 (less line loss, greater efficiency)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

List 4 factors that affect the resistance of a conductor

A

Length
Diameter
Temperature
Material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What’s bigger a circular mil or a square mil

A

Square mill is bigger

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Why should the nutral of an Edison 3 wire circuit never be opened

A

Alters voltage and current in the circuit if it’s unbalanced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

List 5 characteristics of magnetic lines of force

A

Posses direction
Complete loops
Tension along there lines = smaller
Repel each other
Cannot intersect or cross

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Witch types of diagrams are most use by electrocutions

A

Schematic / Wiring

17
Q

List three reasons for meter reading errors

A

1) Meter position
2) Temperature/ humidity
3) Meter leading

18
Q

What is the ideal resistance for an ammeter
And voltmeter

A

Ammeter = low
Voltmeter = high

19
Q

What is the ideal resistance of a ammeter and voltmeter

A

Ammeter = low
Voltmeter = high

20
Q

What is meter loading

A

When a meter is added to a circuit and alters the voltage or current significantly

21
Q

What are the laws of charged bodies

A

Like charges repel, opposites attract

22
Q

What are the two most common semi conductor material used

A

Silicon or geranium

23
Q

What types of charge is associated with N type and P type material

A

N= negative
P= positive

24
Q

Do semi conductors have a negative or positive temperature coefficient

What does it mean

A

Negative
It means Temp will increase and Resistance will decrease

25
Q

How is heat dissipated from a semi conductor device such as a diode

A

Use a heat sink

26
Q

Do semi conductor have a negative or positive temperature coefficients

A

Negative
Because T increases, R decreases

27
Q

How is heat dissipated from a semi conductor device such as a diode

A

Uses a heat sink

28
Q

What is meant by the frame forward bias and reverse bias

A

Forward bias = current flows in the forward direction

Reverse bias = reduces current flow in diodes

29
Q

Why is the PIV rating of a diode important to no

A

So you don’t go higher then it or the diode will be forced to conduct in reverse bias

30
Q

Why is the PIV rating of a diode important to no

A

So you don’t go higher then it or the diode will be forced to conduct in reverse bias

31
Q

What is a common application for a diode for inductive loads

A

Freewheeling diode

32
Q

What are two topical ratings that come with Zener diodes

A

1) Zener voltage
2) Watt rating

33
Q

Can Zener diodes always be tested with and ohmmeter

A

Most of the time
If provided the reverse bias break over voltage isn’t breached

34
Q

What happens to the depletion region when a diode is connected forward bias or reverse bias

A

Depletion zone is reduced

35
Q

List two types of damage that can occur from and electrical fault

A

Mechanical, heat damage

36
Q

What hight should you not enter a ditch

A

1.2 meters

ELX (55 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions