P3 - Sustainable Energy Flashcards Preview

GCSE OCR Physics > P3 - Sustainable Energy > Flashcards

Flashcards in P3 - Sustainable Energy Deck (13)
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1
Q

Electricity is a primary/secondary energy source?

A

Electricity is a secondary energy source.

2
Q

Compare irradiation and contamination.

A
  • 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.
3
Q

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

A
  • 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.
4
Q

What are the units for Power?

A

W.

5
Q

What are the units for Current?

A

A.

6
Q

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

Energy transferred = Power * Time.

A

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

and

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

7
Q

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

A
  • Efficiency.
  • Cost.
  • Environmental damage.
  • Power output.
  • Lifetime.
8
Q

Name some ways of reducing energy losses in the home.

A

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.
9
Q

Name some ways of reducing energy losses in the workplace.

A

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.
10
Q

Name some ways of reducing energy loss nationally?

A

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.
11
Q

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

A
12
Q

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

A
13
Q

What is the standard voltage of electricity in the UK?

A

230V.