In an ideal transformer, if the primary voltage is doubled and the turns ratio remains the same, what happens to the secondary current?
- A. Doubles
- B. Halves
- C. Remains the same
- D. Becomes four times
Explanation
With the turns ratio fixed, doubling the primary voltage doubles the secondary voltage, and for a given load resistance the secondary current rises in proportion by Ohm's law. The power drawn from the primary rises fourfold to match. The halving answer would apply to comparing primary with secondary current at a fixed input, which is a different question.
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