Mains Electricity Flashcards
0
Q
Define: Alternating Current
A
Current which is constantly changing direction
1
Q
Define: Direct Current
A
Current which flows in one direction
2
Q
Define: Mains electricity
A
Electricity supply from the National Grid. At 50Hz and 230V.
3
Q
Define: Fuse
A
A circuit component with a breakable wire which melts when the current exceeds the stated rating. Used as a safety device in electric items.
4
Q
Define: Circuit Breaker
A
Similar to a fuse but resettable. Uses electromagnets.
5
Q
Define: RCCB
A
A very fast circuit breaker. Quicker than a fuse and resettable.
6
Q
Define: Power
A
Rate of transfer of energy
7
Q
Remember to check the oscilloscope…
A
…and the wiring of a plug!
