P5 Flashcards
1
Q
Main supply in homes is…
A
AC
2
Q
Battery supply is….
A
DC
3
Q
What are the wires in a cable?
A
Live wire - brown - provides AC PD
Earth wire - green and yellow - protecting wiring
Neutral wire - blue - completes circuit
4
Q
Is a live wire dangerous?
A
Yes it can give you an ekectrical shock and can be fatal.
5
Q
What is the UK mains supply?
A
An AC supply of up to 230V
6
Q
What is the frequency of the UK mains supply?
A
AC UK mains supply is 50 cycles per second or 50HZ
7
Q
What direction does DC go through?
A
Only one same direction.
8
Q
PD of all wires is…
A
Live wire = 230V
Earth wire = 0V
Neutral wire = 0V
