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Why are step-up transformers used in the national grid? A - OCR Gateway - GCSE Physics (Combined Science) - Question 6 - 2021 - Paper 1
Question 6
Why are step-up transformers used in the national grid? A. To generate alternating currents. B. To increase the current from power stations. C. To increase the volta... show full transcript
Worked Solution & Example Answer:Why are step-up transformers used in the national grid? A - OCR Gateway - GCSE Physics (Combined Science) - Question 6 - 2021 - Paper 1
Step 1
To increase the voltage from power stations.
Answer
Step-up transformers are used in the national grid primarily to increase the voltage produced by power stations. By raising the voltage, the energy can be transmitted over long distances more efficiently. This is because higher voltage allows for lower current, which in turn minimizes energy losses due to resistance in the cables. In summary, the correct choice is C: 'To increase the voltage from power stations.'