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An ideal transformer with a purely resistive load operates at 12 kV on the primary and supplies energy at 120 V. The houses served consume 60 kW on average. The resistive load Rₛ in the secondary circuit is ______ mΩ.

Asked in JEE Main 6th April 1st Shift 2023 · AC generator, motors and devices

Answer: 240

Step-by-step solution

On the secondary Vₛ=120 V delivers P=60 kW.

Rₛ=(Vₛ²)/P=(120²)/(60000)=0.24 Ω=240 mΩ.

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