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negative ends
Alternating currents are produced by alternating voltages in which the positive and ________ keep alternating.
mains supply
The live wire provides the alternating potential difference (about 230V) from the ________.
neutral wire
The ________ completes the circuit- when the appliance is operating normally, current flows through the live and ________, at 0V.
UK mains supply
The ________ is an ac supply at around 50Hz.
ac supplies
In ________ the current is constantly changing direction.
There are two types of electricity supplies
alternating current(ac) and direct current(dc)
ac
mains supply is_
dc
battery supply is_
alternating current
ac meaning is______
direct current
dc meaning is_____
live, neutral and earth
the three wires are_______
provides alternating potential difference
the live wire___
completes the circuit, current flows through neutral and live. it is at 0V
the neutral wire______
is for safety
the earth wire______
Note 
Flashcard (137)