Would a plug still work without the earth wire?
Yes, the earth wire is for safety
Why could a country not only use wind turbines and solar panels to generate its electricity?
It's not always windy and its not always sunny
What type of supply does a coal power station produce, A.C or D.C?
A.C
What is the name given to a material that can conduct electricity?
A conductor
What is the unit for resistance in a circuit?
Ohm
What is the name given to a material which can not conduct electricity?
An Insulator.
What type of supply does a battery produce, A.C or D.C ?
D.C
Will a bird be electrocuted if it sits on a national grid cable?
No, if it is only touching the live wire, it is not completing a circuit so no current flows
What colour is the live wire in a plug?
Red
What colour is the neutral wire in a plug
Black
What affect is burning fossil fuels having on the environment?
Release CO2 which is a greenhouse gas - causing climate change
Why is it dangerous to touch a live wire and the ground?
A current will flow through you. This can interrupt the rhythm of your heart and cause burns.
What colour is the earth wire in a plug ?
Green
Why could a country not only use wind turbines and solar panels to generate its electricity?
It's not always windy and its not always sunny
What is the frequency of the India mains electricity supply (it's an A.C supply)
50 Hz
When using something with moving parts, how do you reduce the wasted energy transferred as heat (due to the friction force).
Lubrication (grease, oil etc.)
What is a fuse?
A piece of wire which will melt and break the circuit if too much current is flowing.