5.1 Alternating Current Flashcards
1
Q
What is a direct current?
A
Current that passes in one direction only (DC)
2
Q
What is alternating current
A
Current that is in a circuit that repeatedly reverses its direction (AC)
3
Q
What is the frequency of the UK mains supply
A
50 Hz
4
Q
What is the voltage of the mains?
A
230 volts (V)
5
Q
What is frequency?
A
The number of wave crest passing a fixed point every second
6
Q
What is oscilloscope?
A
a device used to display the shape of an electrical wave
7
Q
What is a neutral wire? Colour?
A
The wire in a mains circuit that is earthed at the local substation so that the potential is close to zero Blue
