Generation, Transmission and Distribution

The main way of generating electricity in the UK is via:

• wind turbines

• electromagnetic induction

• solar PV

• steam engines

Electricity is generated at:

• 275kV

• 66kV

• 25kV

• 11kV

Transformers are used in transmission because:

• they can keep the transmission lines cool

• they can change potential energy into kinetic energy

• they are highly efficient

• they are able to step voltages up and down

In a power station steam drives a:

• turbine that turns a generator to produce electricity

• generator that turns a turbine to produce electricity

Which is not a biofuel?

• animal waste

• methane

• ethanol

• coal

The definition of renewable is:

• replenishes at a rate > rate of consumption

• energy sources that can be replaced and quickly replenished

• replenishes at a rate < rate of consumption

Where does the energy for hydroelectricity come from?

• gravity

• heat energy

• kinetic energy

Why is tidal power more reliable than wind energy?

• we don't know when its going to be windy

• tides are hard to predict

• we have two tides every day

• its always windy

Which of the following is NOT a disadvantage of solar cells?

• very expensive

• convert <10% of solar energy absorbed into electrical energy

• cost nothing to run

• can't always rely on it being sunny

The national grid voltage is:

• 132 000V or more

• 32 000V or more

• 240V or less

• 140V or less