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The electric potential at 0.1 m from a p...

The electric potential at 0.1 m from a point charge is 90 V. What is the magnitude of the charge ?
Given `epsi_(0)=8*854xx10^(-12)C^(2N^(-1)m^(-2)`

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Verified by Experts

`v=90V`
`r=0*1m`
(Charge) q=?
`V=(1)/(4pi epsi_(0))(q)/(r )`
`rArr 90=9xx10^(9)xx(q)/(0.1)`
`rArr q=10^(-9)C=1nC`
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