Exam-style question
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What happens to the current in a transformer when the voltage is increased?.
- A.The current increases proportionally
- B.The current decreases proportionally
- C.The current remains constant
- D.The current becomes zero
Model answer
What a good answer should say
- The current decreases proportionally
Explanation
Why this works
According to the principle of conservation of energy, when the voltage is increased in a transformer, the current must decrease proportionally to maintain the power balance, assuming ideal conditions.
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