Physics KS9 Topic 10.9 - 10.11

Explain how do solar cells work.

You should include how it converts energy, where they are used and what they are used for.

[3 marks]

Are solar panels and solar water heating the same?

[1 mark]

How efficient are solar panels in 2021?

You may search for the answer on the internet.

[1 mark]

List two disadvantages of building geothermal power stations.

Please find the answer from your textbook only

[2 marks]

What is the source of geothermal energy and what should you do to get to the source?

[2 marks]

What are the similarities and differences between tidal power and hydroelectric power?

[4 marks]

List down three kinds of biofuels and state what they are made of.

[6 marks]

What is the formula for payback time?

[1 mark]

The cost of a biomass generator is RM1,500 and one would save RM200 per year on his/her electricity bill by using the biomass generator. Work out the payback time.

[2 marks]

List three things to consider when looking for the best source of energy in the future.

[3 marks]