1.

In the question number 78, the surface charge density on the outer surface is

Answer»

`(-q)/(4piR_(1)^(2))`
`(q)/(4piR_(2)^(2))`
`(q^(2))/(4piR_(1)^(2))`
`(2q)/(4piR_(2)^(2))`

Solution :Surface charge DENSITY on the OUTER surface
`=(+q)/(4piR_(2)^(2))`


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