AIIMS 2019 Physics Transformers MCQ Question

In the given problem, the relationship between input and output power in an ideal transformer is utilized to find the secondary resistance $R_s$. By rearranging the equation $P_{in} = P_{out}$ and substituting the known values, we find $R_s \approx 0.968 \, \Omega$, which rounds to approximately $1 \, \Omega$, making option (B) the closest correct answer. Options (A), (C), and (D) are incorrect as they do not match the calculated resistance; specifically, $0.5 \, \Omega$ is too low, $2 \, \Omega$ and $4 \, \Omega$ are too high, demonstrating the importance of accurate calculations in electrical engineering principles.