Three charges Q, `+q` and `+q` are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to A. (a) `(-q)/(1+sqrt2)`B. (b) `(-2q)/(2+sqrt2)`C. (c) `-2q`D. (d)`+q`

Three charges Q, `+q` and `+q` are placed at the vertices of a right-a

1.	Three charges Q, `+q` and `+q` are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to A. (a) `(-q)/(1+sqrt2)`B. (b) `(-2q)/(2+sqrt2)`C. (c) `-2q`D. (d)`+q`
Answer» Correct Answer - B Here we have `(Qq)/(a)+(q^2)/(a)+(Qq)/(asqrt2)=0` `:.` `Q=-(qsqrt2)/(sqrt2+1)=-(2q)/(2+sqrt2)`

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Three charges Q, `+q` and `+q` are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to A. (a) `(-q)/(1+sqrt2)`B. (b) `(-2q)/(2+sqrt2)`C. (c) `-2q`D. (d)`+q`

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