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Three point charges -Q, Q and Q are plac...

Three point charges -Q, Q and Q are placed on a straight line with distance d between charges as shown. Find the magnitude of the electric field at the point P in the configuration shown which is at a distance a from middle charge Q in the system provided that `a gt gt d`. Take `2Qd=p`.

Text Solution

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The correct Answer is:
`1/(4pi epsi_(0) a^(3)) sqrt(Q^(2)a^(2)+p^(2))`
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