What type of supply does a battery produce, A.C or D.C
D.C
What type of supply does a coal power station produce, A.C or D.C?
A.C
What is the frequency of the UK mains electricity supply (it's an A.C supply)
50Hz
Name 3 fossil fuel energy sources, used to generate electricity.
Coal, Oil, Natural gas
Which energy source used to generate electricity is non renewable, but not a fossil fuel?
Nuclear
Name 3 renewable sources of energy used to generate electricity
wind, wave, solar, geothermal, hydro (gravitational potential energy), bio fuels
What is the name given to a material which can not conduct electricity?
An insulator
What is the name given to a material that can conduct electricity?
A conductor
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.
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 is a fuse?
A piece of wire which will melt and break the circuit if too much current is flowing.
What affect is burning fossil fuels having on the environment?
Release CO2 which is a greenhouse gas - causing climate change
Burning fossil fuels releases sulfur oxides, what negative environmental effect is caused by sulfur oxides?
Acid rain
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 function of a step up transformer?
To increase the voltage of a supply to reduce energy loss in the cables.
