Three point charges are arranged such that they take the shape of an isosceles triangle with sides 2.00C, -4.00C, 7.00C subtended by an angle of 60.0 degree at one end. Find(a) the magnitude and (b) the direction of the electric force on the particle at the origin.
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Expert's answer
2020-10-16T10:59:58-0400
Let the particles be arranged such that -4C is at origin.
Let 2C be placed on y-axis at a distance of 1m.
Let 7C be placed on x-axis at a distance of 1m.
Then force due to 2C charge on the charge at origin,
F1=4πϵ01122×4=72×109N along y-axis.
Force due to charge 7C,
F2=4πϵ01124×7=252×109N along x-axis.
Since F1 and F2 are perpendicular to each other then resultant force will be,
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