3.1 Name TWO alternative energy sources that use a turbine and a generator to generate electricity - NSC Agricultural Technology - Question 3 - 2021 - Paper 1
Question 3
3.1 Name TWO alternative energy sources that use a turbine and a generator to generate electricity.
3.2 The picture below shows a 3 000-watt photovoltaic solar pane... show full transcript
Worked Solution & Example Answer:3.1 Name TWO alternative energy sources that use a turbine and a generator to generate electricity - NSC Agricultural Technology - Question 3 - 2021 - Paper 1
Step 1
3.1 Name TWO alternative energy sources that use a turbine and a generator to generate electricity.
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Answer
Two alternative energy sources include:
Wind
Geothermal
Step 2
3.2.1 How many of these systems do you need to provide sufficient power to a 6 kW submersible pump?
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Answer
You would need two of these systems to provide sufficient power for a 6 kW submersible pump.
Step 3
3.2.2 Determine whether the panels should be connected in parallel or series. Give a reason for your answer.
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The panels should be connected in series. This connection will increase the total voltage output while maintaining the same current, which is necessary for higher power ratings.
Step 4
3.2.3 Give a reason for the use of silicon in the manufacturing of the solar cells.
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Silicon is used because it is a semi-conductive material that can withstand high temperatures and is effective in converting sunlight into electricity.
Step 5
3.2.4 Name the layer of the solar panel that carries negative electrons.
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The top layer of the solar panel is known as the N-Type layer, which carries the negative electrons.
Step 6
3.2.5 What can be done to ensure that electricity is also available during the night if you use a solar power electric system?
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To ensure electricity availability during the night, a battery system can be used to store excess energy generated during the day.
Step 7
3.2.6 Name THREE applications of electric solar panels on a game farm.
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Three applications of electric solar panels on a game farm include:
Providing power to security cameras
Electric fencing
Borehole pumps
Step 8
3.3 State FOUR advantages of a geothermal power station.
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Four advantages of a geothermal power station are:
It produces no pollution.
The land cost for building is usually less expensive.
It offers clean energy.
It has low running costs.
Step 9
3.4 Name FOUR factors that must be considered when choosing a suitable location for installing a wind turbine on a farm.
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Four factors to consider include:
Must be in an open space/field area.
The absence of obstacles like trees or hills.
The proximity to residential areas should be minimal.
The wind speed in the area should be sufficient to generate energy.
