electricity in the homes Flashcards
what are the two types of electricity supplies
alternating current and direct current
what happens to the current in ac supplies
the current it constantly changing direction
how are alternating currents produced
by alternating voltages
how much v is an ac supply
at around 230v
what is the frequency of the ac main supply
50 cycle per second or 50Hz
what is dc
direct current
hat is direct current
the current that is always flowing in the same direction
what is direct current created by
direct voltage
what is the blue wire
the neutral wire
what is the brown wire
the live wire
what is the green and yellow wire
the earth wire
what does the neutral wire do
completes the circuit when the appliance is operating normally
what does the live wire do
provides alternating pd at about 230v
what does the earth wire do
its for protecting the wiring and stops the appliance casing from becoming live
