P3 - Sustainable Energy

Question 1

Electricity is a primary/secondary energy source?

Answer 1

Electricity is a secondary energy source.

Question 2

Compare irradiation and contamination.

Answer 2

• Irradiation is where you are exposed to radiation outside of your body.
• Contamination is where radiation is in or on your body, and you are continually being exposed by radiation.

Question 3

How can you increase the amount of electricity produced by a Generator?

Answer 3

• Spin the magnet faster.
• Use a stronger magnet, such as an electromagnet.
• Use a soft iron core.
• Increase the number of turns on the coil.

Question 4

What are the units for Power?

Answer 4

W.

Question 5

What are the units for Current?

Answer 5

A.

Question 6

What are the two sets of units used in this formula:

Energy transferred = Power * Time.

Answer 6

Energy transferred (J) = Power (W) * Time (s)

and

Energy transferred (kWh) = Power (kW) * Time (h).

Question 7

What should you use to compare energy sources for generating electricity?

Answer 7

• Efficiency.
• Cost.
• Environmental damage.
• Power output.
• Lifetime.

Question 8

Name some ways of reducing energy losses in the home.

Answer 8

Any of the following:

• Installing double or triple-glazed windows.
• Cutting out draughts around doors, windows and skirting boards.
• Installing loft insulation.
• Using energy-saving light bulbs.
• Switching off appliances when not required.
• Replacing old appliances with more efficient, newer models.

Question 9

Name some ways of reducing energy losses in the workplace.

Answer 9

Any of the following:

• Cleaning air conditioner filters.
• Using low-energy light bulbs.
• Roof insulation / cavity wall insulation.
• Use of efficient, modern, low-energy machinery.
• Use of modern, efficient vehicles for transport of goods.

Question 10

Name some ways of reducing energy loss nationally?

Answer 10

Any of the following:

• Replacing old houses with new, efficient ones.
• Increased use of public transport.
• More efficient trains and buses.
• Encourage more widespread recycling.
• Encourage car sharing and fewer journeys.

Question 11

Draw a diagram to show how electricity is generated and distributed when using fossil fuels.

Answer 11

Question 12

Draw a diagram to show how electricity is generated and distributed using Nuclear Fuels.

Answer 12

Question 13

What is the standard voltage of electricity in the UK?

Answer 13

230V.