1.

Equal charges q are placed at the four corners A, B, C, D of a square of length a. The magnitude of the force on the charge at B will be

Answer»

`(3q^2)/(4 pi epsi_0 a^2)`
`(4q^2)/(4 pi epsi_0 a^2)`
`[(1+2 SQRT(2))/(2)] (q^2)/(4 pi epsi_0 a^2)`
`[2+ (1)/( sqrt(2))](q^2 )/(4 pi epsi_0 a^2)`

Answer :C


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