Exam-style question
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What is the primary function of a transformer in power transmission?.
- A.To change the frequency of the electrical supply.
- B.To step up or step down voltage levels.
- C.To convert electrical energy into mechanical energy.
- D.To store electrical energy for future use.
Model answer
What a good answer should say
- To step up or step down voltage levels.
Explanation
Why this works
The primary function of a transformer is to step up or step down voltage levels in an electrical circuit. This mechanism allows for efficient transmission of electricity over long distances by adjusting voltage to minimize losses.
The effect is that electricity can be transmitted efficiently, ensuring reliable power supply.
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