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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 of the electric field `vecE` as a function of distance r from centre O is given by ______.
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Solution
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 of the electric field `vecE` as a function of distance r from centre O is given by
Explanation:
As far as we are aware, the conductor is not charged.
When taking into account an innermost sphere
For region or 0 < r < R, E = 0
R < r < a, E ∝ `1/r^2`
The shell is empty. So there is no charge inside the shell.
a < r < b ⇒ E = 0
For the region, r > b,
E ∝ `1/r^2`
