Physics · 2020
JEE Main · 5 September 2020, Shift 1 · Q13
An electrical power line, having a total resistance of 2 Ω, delivers 1 kW at 220 V. The efficiency of the transmission line is approximately:
An electrical power line, having a total resistance of $\displaystyle 2 \Omega$, delivers $\displaystyle 1$ kW at $\displaystyle 220$ V . The efficiency of the transmission line is approximately :
Official answer
(1)
$\displaystyle 96$%
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.