Physics · Current Electricity

JEE Main 2024 — 27 January, Shift 1 — Question 46

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 :

Option A:
$\frac{1}{25} \mathrm{R}$
Correct
Option B:
$\frac{1}{5} R$
Option C:
25 R
Option D:
5 R

Answer: A

Step-by-step solution

Resistance of each part $=\frac{R}{5}$ Total resistance $=\frac{1}{5} \times \frac{\mathrm{R}}{5}=\frac{\mathrm{R}}{25}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 27 January, Shift 1
Subject: Physics
Chapter: Current Electricity
Topic: Ohm's Law and Calculation of Resistance

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