Alice 8956
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OCR Gateway science, Physics, GCSE - revision resource for P2

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Alice 8956
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Physics P2

Question 1 of 7

1

What are the advantages of photocells?

Select one or more of the following:

  • Robust

  • do not need maintenance

  • no fuel needed

  • no long power cables needed

  • no pollution

  • do not contribute to global warming

  • use a renewable energy resource

  • They do not work when dark or cloudy

  • They produce no CO2 emissions in their total product lifetime

Explanation

Question 2 of 7

1

Photocells are made of a conductive material - silicon

Select one of the following:

  • True
  • False

Explanation

Question 3 of 7

1

Glass is transparent to...

Select one of the following:

  • Short wavelength radiation

  • Long wavelength radiation

Explanation

Question 4 of 7

1

Solar reflectors are moved by the computer to ensure that they are always facing the sun

Select one of the following:

  • True
  • False

Explanation

Question 5 of 7

1

The energy produced by a wind farm depends upon...

Select one of the following:

  • the size of the wind turbine

  • the speed of the wind

  • the direction of the wind

Explanation

Question 6 of 7

1

Some people hate wind turbines because they spoil the view

Select one of the following:

  • True
  • False

Explanation

Question 7 of 7

1

The current from a dynamo can be increased by...

Select one or more of the following:

  • Using a stronger magnet

  • Increasing the number of turns on the coil

  • Rotating the magnet faster

  • Using thinner wire to decrease resistance

  • Increase the surrounding temperature

  • Slowing down the magnet

  • Moving the magnet up and down, as well as rotating it

Explanation

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