In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?
Correct answer: A. less than 15 A
- A. less than 15 A
- B. more than 15 A
- C. 15 A
- D. none of the above
Explanation
For an ideal step-down transformer, the primary current change is reduced in the inverse ratio of the voltage transformation: ΔI₁ = (N₂/N₁)ΔI₂, with N₂ less than N₁. Hence a 15 A secondary-current change produces a supply-current change below 15 A.
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