JEE Main 2017PhysicsCurrent ElectricityMediumMCQ

JEE Main 2017 — Current Electricity Question with Solution

JEE Main 2017 (09 Apr Online)

Question

The figure shows three circuits I, II and III which are connected to a 3 V battery. If the powers dissipated by the configurations I, II and III are P1, P2 and P3 respectively, then -

Choose an option

Show full solutionCorrect option: A
Correct answer
AP2>P1>P3

Step-by-step explanation

P=V2R
P∝1R
Req for I circuit by balanced Wheatstone bridge
 R1=1 Ω

Req   for circuit II by parallel combination
1R2=12+ 12+11

 R2=12

Req for circuit III by parallel and series combination
R3=1+112+12
R3=2

so,P2>P1>P3.

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About this question

This is a previous-year question from JEE Main 2017, 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.