Electricity Flashcards
What colour is the live wire?
How many volts dose a live wire stay at?
Brown
0
What colour is a natural wire?
Why dose the natural wire carry a current away?
Blue
If they is a fault
What colour is a earth wire?
What is the voltage of a earth wire?
Yellow and green
Changes between a high and low voltage
A cable consist of what type of metal wire?
Copper
What insulating material is used around a cable?
Rubber or flexible plastic
What is a case of a plug made out of?
Stiff plastic
Why are electric wires made of copper not brass or steel?
Because copper is flexible and a good conductor of electricity
Why are pins of a 3 pin plug made of brass and not copper or steel?
It will keep secure as not flexible is a good conducter of electricity
Why is they a fuse in every plug?
Yo melt and break the circuit if they is too much current flow
Why must the fuse in a circuit be the same voltage as the current or a little but higher?
If the voltage of the fuse was any lower it will melt
What is it called when cells and batteries supply’s current that always passes in the same direction?
Direct current
What is a alternating current?
When a cell or battery supply a current that is always constantly changing direction
How are electrical appliances contacted to the mains?
By using cable or 3 pin plug
What are some circuits protected by?
Residual current circuit breakers
What protects the wiring of a circuit?
Earth wire and fuse toughere
