Exam-style question
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Why are transformers useful in power transmission?.
- A.They increase the voltage for efficient long-distance transmission.
- B.They decrease the current to reduce energy loss.
- C.They convert AC to DC for better efficiency.
- D.They store energy for later use.
Model answer
What a good answer should say
- They increase the voltage for efficient long-distance transmission.
Explanation
Why this works
Transformers increase the voltage of electrical energy, which reduces the current in the transmission lines. This mechanism minimizes energy loss due to heat in the wires, allowing electricity to be transmitted over long distances more efficiently.
The consequence is that it enables the delivery of electricity to homes and businesses with less energy wasted.
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