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Electricity can be produced in a power station - OCR Gateway - GCSE Physics (Combined Science) - Question 14 - 2019 - Paper 12
Question 14
Electricity can be produced in a power station. (a) Explain the difference between renewable and non-renewable energy sources. Give one example of each energy sour... show full transcript
Worked Solution & Example Answer:Electricity can be produced in a power station - OCR Gateway - GCSE Physics (Combined Science) - Question 14 - 2019 - Paper 12
Step 1
Explain the difference between renewable and non-renewable energy sources.
Answer
Renewable energy sources are those that can be replenished naturally over a short period of time. Examples include solar, wind, and hydroelectric energy. These sources do not deplete and are sustainable in the long run.
Non-renewable energy sources, on the other hand, are those that exist in finite amounts and take millions of years to form. Examples include coal, oil, and natural gas. Once consumed, they cannot be replaced within a human lifespan.
Step 2
Give one example of each energy source to help explain your answer.
Answer
An example of a renewable energy source is wind energy, which is generated from the wind using turbines.
An example of a non-renewable energy source is coal, which is mined from the earth and burned to produce electricity.
Step 3
Explain how the national grid transfers energy in an efficient way.
Answer
The national grid transfers energy efficiently by using high-voltage transmission lines. This method reduces energy loss during transmission, as higher voltages allow for lower currents, which in turn minimizes heat loss due to resistance in the wires. The grid also ensures that energy is distributed evenly to accommodate demand across different regions.