JEE Main 2021 — Current Electricity Question with Solution
From: JEE Main 2021 (Online) 22th July Evening Shift
Question
A Copper (Cu) rod of length 25 cm and cross-sectional area 3 mm2 is joined with a similar Aluminium (Al) rod as shown in figure. Find the resistance of the combination between the ends A and B.
(Take Resistivity of Copper = 1.7 108 m and Resistivity of Aluminium = 2.6 108 m)
(Take Resistivity of Copper = 1.7 108 m and Resistivity of Aluminium = 2.6 108 m)
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: C
Correct answer
C0.858 m
Step-by-step explanation
m
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This is a previous-year question from JEE Main 2021, 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.