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[" 14.Equal charges "q" are placed at th...

[" 14.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 "B" will be "],[[" (1) "(3q^(2))/(4 pi varepsilon_(0)a^(2))," (2) "(4q^(2))/(4 pi varepsilon_(0)a^(2))],[" 15.Two spherical condis."]]

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