JEE Main 2022 · 28 Jul · Shift 2 · Physics Q14

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PhysicsSingle correct+4 / -1Question 14 of 90

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

800 Ω and 1.06 Ω

10 Ω and 500 Ω

800 Ω and 0.32 Ω

1.06 Ω and 500 Ω

Answer and worked solution

Official answer: C

Loads. $R=\frac{V^2}P$ : $\frac{(8000)^2}{8\times10^4}=800$ Ω and $\frac{160^2}{8\times10^4}=0.32$ Ω.

(C)

Topics:Transformers and AC generator

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JEE Main 2022 · 28 Jul · Shift 2, Physics question 14