Domestic Electricity Flashcards
Define alternate current
Comes from the mains electricity at an average of 230V
Define direct current
Comes from a battery at 1.5V
What colour is the earth wire
Green and yellow
What colour is the live wire
Brown
What colour is the neutral wire
Blue
Which side is the neutral wire
Left
What side is the live wire
Right
What material are the pins made of in a plug
Brass because it doesn’t rust and is a good conductor
What material is the casing of a plug made of
Plastic - a good insulator of electricity
What does the casing around a plug prevent
The wires from touching
What type of current does the live wire carry
Alternating current
What does the neutral wire do
Completes the circuit so its kept at 0V
What does the earth wire do
Safety wire safer to touch device if there is a fault
When does a fuse blow
When the current is too high
What is a short circuit
When current flows along an easy path without passing through the appliance. There’s little resistance in this part so it overheats and fires
A fuse has what built in weak point
A qire with a high resistance
What is a circuit breaker
When there is too much current the electromagnet opens the switch and stops the current
Define power
The rate that energy is transferrent
Whats the way to remember equations
EVie QuITs smoking so she Pees on the IV with her PET because she got a VIRus
Ehat voltage is produced by power stations
25,000
What voltage is sent through the national grid
132,000 - 400,009
What voltage arrives at our homes
230V
Define national grid
A nationwide network of cables and transformers that transforms electricity from power stations to consumers
What remains constant is transformers?
Power does as is P.D. increases the current decreases
