JEE Main 2019 — Electrostatics Question with Solution
From: JEE Main 2019 (Online) 12th April Morning Slot
Question
Shown in the figure is a shell made of a conductor. It has inner radius a and outer radius b, and carries charge
Q. At its centre is a dipole
as shown. In this case :
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: D
Correct answer
Delectric field outside the shell is the same as that of a point charge at the centre of the shell
Step-by-step explanation
Total charge of dipole = 0, so charge induced on
outside surface = 0.
But due to non uniform electric field of dipole, the charge induced on inner surface is non zero and non uniform.
So, for any observer outside the shell, the resultant electric field is due to Q uniformly distributed on outer surface only and it is equal to.
But due to non uniform electric field of dipole, the charge induced on inner surface is non zero and non uniform.
So, for any observer outside the shell, the resultant electric field is due to Q uniformly distributed on outer surface only and it is equal to.
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