An electrically isolated, hollow conducting sphere has a small positively charged ball suspended by an insulating rod from its inside surface, see diagram. This causes the appearance of negative charge on the inner surface of the sphere. The electric field outside and far from the conducting sphere is approximately –
A
Zero
B
The same as of the sphere was not there
C
Half what it would be if the sphere was not there
D
Is 
, where r is the distance from center of sphere
, where r is the distance from center of sphere
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(b, d)
Now electric field outside the sphere is due to charge on outer sphere as E due Q and – Q get cancel.
∴ E = 
∴ E will remain same as there was no sphere.
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