Brainscape's Knowledge GenomeTM

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


See full index

Physics > Safety with Electricity > Flashcards

Safety with Electricity Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Brown

A

Live wire

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

Blue

A

Neutral wire

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

Green/Yellow striped

A

Earth wire

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

Live + neutral

A

Provide PD needed

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

Wires are encased…

A

Plastic insulation, one cord, mains

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

Earth wires from all electric sockets

A

One thick wire, metal spike, driven into ground

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

Earth wire completes circuit

A

Connects live wire to ground, short circuit

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

Earth wire has a

A

Low resistance, strong currents easily flow through it

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

Short circuit

A

Extra electrical pathway, low resistance, over heating

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

Fuse

A

Wire which will melt if the current traveling through it becomes too large, breaks circuit, stops current

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

Fuses have

A

Max. current that they can handle

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

Disadvantage of a fuse

A

Has to be replaced each time

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

Advantage of circuit breaker

A

Can be reset

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

Circuit breakers consist of

A

A switch connected to an electromagnet

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

Electromagnet

A

Forms due to electric current around a bar, strength depends on current

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

Switch is on

A

Through device, moving contact, stationary contact, around electromagnet, other side

17
Q

Iron catch

A

Holds moving contact

18
Q

Current reaches unsafe levels

A

Strong, pulls lever, release moving contact, breaks circuit

19
Q

Earth leakage

A
  • switches off electricity supply

* able to detect if there is current moving through earth wire, short circuits, shuts down

20
Q

Lightning rod

A
  • metal pole connected to house, one end buried in ground

* lightning, sure in current flows through pole

21
Q

Live wire

A

Enters house

22
Q

Neutral wire

A

Leaves house, earthed

23
Q

Earth wire prevents

A

Someone from getting shocked from a fault in appliance

24
Q

Illegal connections

A
  • attach home’s electrical circuit to grid without meter
  • without consent or knowledge of Eskom, stealing, cannot monitor
  • very dangerous
25
Q

Safety hazard of a parallel circuit

A

Can become overloaded with too many branches

Physics (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions