A photograph of a wind turbine is shown below. Answer the questions that follow. 3.1.1 Name THREE aspects to consider when selecting a wind turbine to generate power for an electric fence on a game farm. 3.1.2 Describe FOUR advantages of using a wind turbine to generate electrical energy. Solar energy is one of the greatest sources of alternative energy, but it is also a source that is mostly underutilised.

NSC Agricultural Technology Alternative energy: A photograph of a wind turbine i

A photograph of a wind turbine is shown below - NSC Agricultural Technology - Question 3 - 2017 - Paper 1

Question 3

A photograph of a wind turbine is shown below. Answer the questions that follow. 3.1.1 Name THREE aspects to consider when selecting a wind turbine to generate powe... show full transcript

Worked Solution & Example Answer:A photograph of a wind turbine is shown below - NSC Agricultural Technology - Question 3 - 2017 - Paper 1

Step 1

Name THREE aspects to consider when selecting a wind turbine to generate power for an electric fence on a game farm.

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Answer

Surrounding environment/site selection/topography: The geographical location plays a crucial role in the efficiency of the wind turbine. A site with a consistent wind flow and minimal obstructions is ideal.
Cost effectiveness: It is essential to assess the initial investment against potential savings in energy costs and the turbine's lifespan.
Wind speed: Evaluate the average wind speed in the area to ensure that the turbine can operate efficiently and generate sufficient power for the electric fence.

Step 2

Describe FOUR advantages of using a wind turbine to generate electrical energy.

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No fuel costs: Wind power harnesses a free and renewable energy source, eliminating fuel costs associated with fossil fuels.
Low maintenance costs: Wind turbines are generally reliable and require minimal maintenance compared to other energy sources.
No clean-up costs: Using wind energy does not result in pollution, thereby avoiding costs related to environmental cleanup.
Reduced reliance on imported fuels: Utilizing local wind resources can decrease the dependence on foreign energy sources, enhancing energy security.

Step 3

Name TWO types of energy that are generated directly from solar energy and give an example of a device that can convert this energy effectively.

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Heat: Solar cookers harness solar energy for cooking, providing an efficient heat source.
Electricity: Solar photovoltaic (PV) cells convert sunlight into electrical energy for various uses.

Step 4

Name the component that is used to change direct current (DC) generated by photovoltaic cells into alternating current (AC).

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Answer

The component used to convert DC into AC is called an inverter.

Step 5

What is the most common semiconducting material used for manufacturing solar panels?

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The most common semiconductor material used for solar panels is Silicon.

A photograph of a wind turbine is shown below - NSC Agricultural Technology - Question 3 - 2017 - Paper 1

Worked Solution & Example Answer:A photograph of a wind turbine is shown below - NSC Agricultural Technology - Question 3 - 2017 - Paper 1

Name THREE aspects to consider when selecting a wind turbine to generate power for an electric fence on a game farm.

Describe FOUR advantages of using a wind turbine to generate electrical energy.

Name TWO types of energy that are generated directly from solar energy and give an example of a device that can convert this energy effectively.

Name the component that is used to change direct current (DC) generated by photovoltaic cells into alternating current (AC).

What is the most common semiconducting material used for manufacturing solar panels?

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