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Question

Consider a uniformly charged sphere that has a total charge of Q that has a radius of R. What is the electrostatic potential difference, ΔV , between the centre of the sphere and the surface of the sphere?

A
4keqR
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B
2keqR
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C
keqR
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D
keq2R
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Solution

The correct option is D keq2R
Total charge =Q
radius =R
Potential difference =ΔV
ΔV=E.ds
=Kθr2dr
=KQdrr2
=KQr2dr
=KQr2+12+1
=KQ12r where radius =R
=KQ2R.

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