When carrying electricity on long distances, step-up transformers are used to:
Correct answer: A. Increase voltage reduce current
- A. Increase voltage reduce current
- B. Increase current, reduce voltage
- C. Increase both voltage and current
- D. Increase both voltage and power
Explanation
Step-up transformers are used in long-distance electricity transmission to increase the voltage and decrease the current. This process reduces energy losses during transmission, making it more efficient to transport electricity over large distances. Essentially, by stepping up the voltage, the current is reduced, which minimizes the heat generated due to resistance in the wires.
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About Transformers
Transformers transfer alternating electrical energy between coils by mutual induction, with voltage ratio determined by the turns ratio. The topic covers step-up and step-down transformers, current changes, ideal power conservation and practical losses such as heating and flux leakage. A transformer requires changing magnetic flux, so it does not operate with steady direct current.
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