Physics- P5: Electricity in the home
0.0(0)
Studied by 0 people
Call with Kai
Knowt Play
Learn
Practice Test
Spaced Repetition
Match
FlashcardsCard Sorting
1/11
Earn XP
Description and Tags
Study Analytics
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
12 Terms
1
New cards
AC
Alternating current
2
New cards
DC
Direct current
3
New cards
What is the difference between alternating and direct current?
Direct current electrons only flow in one direction, in alternating current the electrons change directions and vibrate
4
New cards
What is the frequency of UK mains?
50Hz
5
New cards
What is voltage of UK mains?
230V
6
New cards
What is the national grid?
The National Grid is a network high-voltage power systems connecting major power stations
7
New cards
Why is the national grid an efficient way to transfer energy?
The potential difference is very large so much less current is needed
8
New cards
What are the three wires in a plug?
\-Earth wire, live wire and neutral wire,
9
New cards
What is the purpose of the fuse?
It stops too much energy going through, if there is too much energy it will overheat and melt to prevent fires.
10
New cards
What is the purpose of the earth wire?
Prevents electrocution
11
New cards
Why is the live wire dangerous even if the appliance is switched off?
Peoples bodies are at 0V so if a live wire is touched there is a big potential difference that will act across their body causing an electric shock
12
New cards
How do you determine the correct fuse for an applicance?
\-Current= power/voltage
\-Decide whether to use a 3A, 5A of 13A fuse
\-Decide whether to use a 3A, 5A of 13A fuse
Note 
Flashcards (40)