AIIMS 2019 Physics Transformers MCQ Question
In a transformer, numbers of turns in the primary are 140 and that in the secondary are 280. If current in primary is 4 A, then that in the secondary is.
4 A
2 A
6 A
10 A
Correct Answer
Detailed Explanation
The relationship given in the problem states that the number of turns (N) is inversely proportional to the current (i), expressed as Nₚ/Nₛ = iₛ/iₚ. By substituting the known values, we find that 140/280 = iₛ/4 simplifies to iₛ = 2 Å, confirming that option A is correct.
Options B (4 Å), C (1 Å), and D (0.5 Å) do not satisfy the derived equation, as they would not maintain the proportionality established in the problem, demonstrating a misunderstanding of the inverse relationship between turns and current. Understanding this concept is crucial in applications involving transformers and electrical circuits, where such relationships dictate operational efficiency.
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