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Three particles, each of mass m and carr...

Three particles, each of mass m and carrying a charge q each, are suspended from a common point by insulating mass-less strings each of length L. If the particles are in equilibrium and are located at the corners of an equilateral triangle of side a, calculate the charge q on each particle. Assume `Lgtgta`.

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The correct Answer is:
3
F is the resultant of electrostatic forces between two charges.
`F=2F_e cos30^@=2[1/(4pi epsilon_0).q^2/a^2]sqrt3/2=(2xx10^9xx10xxq^2xxsqrt3)/((3xx10^(-2))xx2)`
`=sqrt3xx10^(13)q^2`
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