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JEE Mains · Physics · STD 12 -Electromagnetic induction
  • JEE Mains 2022
  • Medium
  • MCQ

A transformer operating at primary voltage \(8\,kV\) and secondary voltage \(160\,V\) serves a load of \(80\,kW\). Assuming the transformer to be ideal with purely resistive load and working on unity power factor, the loads in the primary and secondary circuit would be.

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Answer & Solution

Correct Answer

(C) \(800\,\Omega\) and \(0.32\,\Omega\)

Step-by-step Solution

Detailed explanation

\(\frac{\left(8 \times 10^{3}\right)^{2}}{R_{p}}=80 \times 10^{3}\)

\(R _{ p }=800\,\Omega\)

\(\frac{(160)^{2}}{R_{S}}=80 \times 10^{3}\)

\(R _{ S }=0.32\,\Omega\)

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