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
Wind
Hydro
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 will need two 3000-watt photovoltaic solar panel systems to provide sufficient power to 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 is because a series connection will increase the total voltage while keeping the current the same, which is necessary to meet the power requirements.
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, which allows it to effectively convert 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/N-Type layer 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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A battery system can be used to store electricity during the day for use at night.
Step 7
3.2.6 Name THREE applications of electric solar panels on a game farm.
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To provide power to security cameras.
Electric fence systems.
Borehole pumps.
Step 8
3.3 State FOUR advantages of a geothermal power station.
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There is no pollution.
The cost of land for a geothermal plant is usually less expensive.
It is considered clean energy.
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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Must be in an open space/field.
The absence of obstacles like trees or hills.
Proximity to residential areas to minimize disturbance.
Availability of consistent wind flow.
Step 10
5 Name the process that is used to manufacture ethanol.
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The process used to manufacture ethanol is known as fermentation.
