2433125
Description
Question 1
Question
What are the advantages of photocells?
Answer
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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
Question 2
Question
Photocells are made of a conductive material - silicon
Answer
- True
- False
Question 3
Question
Glass is transparent to...
Answer
-
Short wavelength radiation
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Long wavelength radiation
Question 4
Question
Solar reflectors are moved by the computer to ensure that they are always facing the sun
Answer
- True
- False
Question 5
Question
The energy produced by a wind farm depends upon...
Answer
-
the size of the wind turbine
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the speed of the wind
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the direction of the wind
Question 6
Question
Some people hate wind turbines because they spoil the view
Answer
- True
- False
Question 7
Question
The current from a dynamo can be increased by...
Answer
-
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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