JEE Main 2024PhysicsCurrent ElectricityEasyMCQ

JEE Main 2024 — Current Electricity Question with Solution

JEE Main 2024 (27 Jan Shift 1)

Question

A wire of resistance R and length L is cut into 5 equal parts. If these parts are joined parallely, then resultant resistance will be :

Choose an option

Show full solutionCorrect option: A
Correct answer
AR25

Step-by-step explanation

Resistance of each part will be equally divided. So, the resistance of each part of the wire can be expressed as R5.

The formula to calculate the equivalent resistance of the combination of resistors is given by

1Req=∑i=151Ri   ...1

From equation (1), it follows that

1Req=5R+5R+5R+5R+5R=25R⇒Req=R25

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About this question

This is a previous-year question from JEE Main 2024, 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.