JEE Main 2021 — Current Electricity Question with Solution
From: JEE Main 2021 (Online) 27th July Morning Shift
Question
In the given figure, a battery of emf E is connected across a conductor PQ of length 'l' and different area of cross-sections having radii r1 and r2 (r2 < r1).
Choose the correct option as one moves from P to Q :
Choose the correct option as one moves from P to Q :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: A
Correct answer
ADrift velocity of electron increases.
Step-by-step explanation
Current is constant in conductor
i = constant
Resistance of element
&
if r decreases, E will increase : Vd will increase
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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.