Electricity in the Home Flashcards
What is the difference between ac and dc?
ac is the mains and dc is battery
What are ac and dc electricity supplies?
AC = Alternating current DC = Direct current
What is the voltage of a standard supply from the mains to households?
230 V
What is the frequency of an ac mains supply?
50 Hz
What does direct current mean?
current that is always flowing the same direction
what does alternating current mean?
current that is constantly changing direction
What colour is the Neutral wire in a standard plug?
Blue
What colour is the Live wire in a standard plug?
Brown
What colour is the Earth wire in a standard plug?
Green and Yellow
What does the live wire do in a standard plug?
provides alternating potential difference (230V)
What does the earth wire do in a standard plug?
Stops the appliance casing from becoming live
What does the neutral wire do in a standard plug?
completes the circuit and carries away current
