10.11 Generators Flashcards
Alternating current(AC)
an electric current that periodically reverses its direction
Direct current
Current produced by batteries that flows in a single direction
Transformers
devices that are used to reduce or increase the supply voltage
What do transformers do at power stations
transformers increase the voltage to
transmit electricity over longer distances.
What kind of electrical circuit is in a house
Parelle circuit
How many volts do household components that make up a circuit receive
240 volts.
What are electrical cables made up of
The active wire(brown)-carries current to the powerpoint
, the neutral wire(blue)- carries current away from the powerpoint
and the earth wire(green and yellow)-connects powerpoint to earth beneath you
How can a person get electrocuted or experience an electric shock?
If any part of your body meets live electricity, an electric current flows through the tissues, which causes an electric shock
what can abnormally high currents cause
melt plastic coatings on wires
set fire to fluff and dust around
wiring in roofs and wall cavities
can pass through you
(electrocution)
House fires can be caused by:
Too many appliances on the
circuit
Too many double adaptors
How can a system be overloaded
when a double adaptor or a power board is
plugged into another double adaptor
or power board
Fuse
A fuse is a switch or piece of wire that melts
or burns when current flows too fast.
what do fuses cause
a break in a circuit, stopping
the flow of electrical energy.
Why are fuses in circuits
prevent damage to appliances, or to prevent
loss of life.
Where are fuses found
older houses
Cars/trucks
electronic devices
home theatre systems
