What is the difference between the way we can get an electric stove and a cellphone to work?
1 cellphone works from a rechargeable battery. The stove is connected to the mains supply.
Why are metal wires covered in a rubber coating?
Because rubber is an insulator
Name three functions of an electrical wire
Conduct electricty ,connect components , transfer energy
Name two functions of a battery
Power source , electrical energy storage
Name one of the best conductors?
Copper
How does your cellphone make use of electricity?
We use electrcity to charge the battery it uses.
Why is it important to have ceramic insulators between two different metal conductors??
To help prevent electricity from flowing between the different parts
Would this be a conductor or an insulator? Why?
Conductor, because it's metal!
If mains electricity flows through your body, you will get an ________________.
electric shock
Why is gold and silver only used sometimes unlike copper?
They're expensive.
Why is rubber good to use around a wire?
It is an insulator, it does not allow electricity to pass through it.
Name three functions of a switch
It controls the flow of electric current , it's used to turn electrical devices on and off , it's a safety measure in electric circuits
What are the conditions for the bulb to light up? Name three
The circuit should have at least all three components.The circuit should be closed. The connections should provide electrical contact (metal on metal).
What do we call people who work with electricity and fix wiring in our houses and other buildings?
Electricians
Compared to copper , why Is Aluminium not a very good conductor?
It has lower conductivity.
Why are our bodies also good conductors?
Electric current can easily flow through it.
Does it matter where in the circuit we position the components?
The sequence of the components in a simple circuit like the one used here is not important.