A hollow sphere having uniform charge density ρ (charge per unit volume) is shown in figure. If b = 2a and potential difference between A and B is 
. Then find the value of n:
Text Solution
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(3)
Sol.
Applying Gauss's law on Gaussian surface shown in figure:
E 4πr 2 = 
= 
∴ E = 
now using 
⇒ V A – V B = 
= 
= 
– 
= 
– 
= 
= 
= 
Put b = 2a
V A – V B = 
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