Q 12-07-084JEE MainJEE Main 2023 (6 Apr, Shift 1)Easy
An ideal transformer with purely resistive load operates at $12\ \text{kV}$ on the primary side. It supplies electrical energy to a number of nearby houses at $120\ \text{V}$. The average rate of energy consumption in the houses served by the transformer is $60\ \text{kW}$. The value of resistive load ($R_s$) required in the secondary circuit will be ______ $\text{m}\Omega$.
Numerical value type. Enter your answer.
Answer: 240
$R_s=\dfrac{V_s^2}{P}=\dfrac{120^2}{60000}=0.24\ \Omega=240\ \text{m}\Omega$.
Solution by Sreeraj P, M.Sc Physics