JEE Main 2021 — Electrostatics Question with Solution
From: JEE Main 2021 (Online) 26th August Morning Shift
Question
A solid metal sphere of radius R having charge q is enclosed inside the concentric spherical shell of inner radius a and outer radius b as shown in the figure. The approximate variation electric field as a function of distance r from centre O is given by
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
Considering outer spherical shell is non-conducting.
Electric field inside a metal sphere is zero.
r < R E = 0
r > R E =
Option (b)
Considering outer spherical shell is conducting
r < R, E = 0
R r < a
E =
a r < b,
E = 0
r b,
E =
Electric field inside a metal sphere is zero.
r < R E = 0
r > R E =
Option (b)
Considering outer spherical shell is conducting
r < R, E = 0
R r < a
E =
a r < b,
E = 0
r b,
E =
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This is a previous-year question from JEE Main 2021, covering the Electrostatics 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.