An ideal transformer with purely resistive load operates at 12 kV on… | JEE Main 2023 (6 Apr, Shift 1)

Q33JEE Main 2023 · 6 APR · SHIFT 1Difficult

AC Generator & Transformer

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 $(\text{Rs})$ required in the secondary circuit will be ___________ $\text{m}\Omega$ .

Numerical answer type. Work it out, then open the answer.

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Answer: 240

Secondary load: $P = \dfrac{V_s^2}{R_s}$ .
$R_s = \dfrac{120^2}{60000} = \dfrac{14400}{60000} = 0.24\ \Omega$
$R_s = 240\text{ m}\Omega$

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