2433125
Beschreibung
Frage 1
Frage
What are the advantages of photocells?
Antworten
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Robust
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do not need maintenance
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no fuel needed
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no long power cables needed
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no pollution
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do not contribute to global warming
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use a renewable energy resource
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They do not work when dark or cloudy
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They produce no CO2 emissions in their total product lifetime
Frage 2
Frage
Photocells are made of a conductive material - silicon
Antworten
- True
- False
Frage 3
Frage
Glass is transparent to...
Antworten
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Short wavelength radiation
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Long wavelength radiation
Frage 4
Frage
Solar reflectors are moved by the computer to ensure that they are always facing the sun
Antworten
- True
- False
Frage 5
Frage
The energy produced by a wind farm depends upon...
Antworten
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the size of the wind turbine
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the speed of the wind
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the direction of the wind
Frage 6
Frage
Some people hate wind turbines because they spoil the view
Antworten
- True
- False
Frage 7
Frage
The current from a dynamo can be increased by...
Antworten
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Using a stronger magnet
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Increasing the number of turns on the coil
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Rotating the magnet faster
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Using thinner wire to decrease resistance
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Increase the surrounding temperature
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Slowing down the magnet
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Moving the magnet up and down, as well as rotating it
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