AIIMS 2019 Physics Transformers MCQ Question

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.