JEE Main 2019 — Current Electricity Question with Solution
From: JEE Main 2019 (Online) 9th January Morning Slot
Question
Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm2, is . If the electron density in copper is 9 1028/m3 the value of . in mm/s is close to (Take charge of electron to be = 1.6 1019C)
Choose an option
Show full solutionCorrect option: A
Correct answer
A0.02
Step-by-step explanation
We know,
I = neAVd
Vd =
=
= 0.02 m/s
I = neAVd
Vd =
=
= 0.02 m/s
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This is a previous-year question from JEE Main 2019, 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.