JEE Main 2020 — Current Electricity Question with Solution
From: JEE Main 2020 (Online) 5th September Morning Slot
Question
An electrical power line, having a total
resistance of 2 , delivers 1 kW at 220 V. The
efficiency of the transmission line is
approximately :
Choose an option
Show full solutionCorrect option: B
Correct answer
B96%
Step-by-step explanation
We know,
Given, P=
= A
Power
efficiency
Given, P=
= A
Power
efficiency
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This is a previous-year question from JEE Main 2020, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.