An ideal transformer with purely resistive load operates at 12 kV on the primary side. It supplies electrical energy to a number of nearby houses at 120 V . The average rate of energy consumption in the houses served by the transformer is 60 kW . The value of resistive load ( R s ) required in the secondary circuit will be _________mΩ .

Question

An ideal transformer with purely resistive load operates at 12 kV on the primary side. It supplies electrical energy to a number of nearby houses at 120 V . The average rate of energy consumption in the houses served by the transformer is 60 kW . The value of resistive load ( R s ) required in the secondary circuit will be _________mΩ .,

MARKS App · Accepted Answer

The given data is P = 60 × 10 3 W V s = 120 V A transformer has a primary coil and a secondary coil. The formula for the power delivered is given by P = V 2 s R s ⇒ 60 × 10 3 = 120 × 120 R s ⇒ R s = 120 × 120 60 × 10 3 = 240 mΩ

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