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Two point charges of 6 nC and 12 nC are ...

Two point charges of 6 nC and 12 nC are placed at the corners of B and C of an equilateral triangle ABC of side 0.03 m . Calculate the magnitude of the resultant electric intensity at the vertex A of triangle.

Text Solution

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`E=(1)/(4piepsilon_(0))(q)/(d^(2))or(9xx10^(9))(q)/(d^(2))`
`E=6xx10^(4)NC^(-1)`
and `E_(2)=12xx10^(4)NC^(-1)`
`E=sqrt(E_(1)^(2)+E_(2)^(2)+2E_(1)E_(2)costheta)`,
`theta=60^(@)`
`E=15.87xx10^(4)NC^(-1)`
or `6sqrt(7)xx10^(4)NC^(-1)`
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