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Earn 100

Three point charges lie on a straight line, as shown in the figure. Find the magnitude of resultant force exerted on the charge in newton.


Important Questions on Electric Charges and Fields
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Two charges of equal magnitudes and at a distance exert a force on each other. If the charges are halved and distance between them is doubled, then the new force acting on each charge is

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(Take )

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A negative charge is placed at the midpoint between two fixed equal positive charges, separated by a distance . If the negative charge is given a small displacement perpendicular to the line joining the positive charges, how the force developed on it will approximately depend on ?

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Let denote the dimensional formula of the permittivity of vacuum. If M = mass, L = length, T = time and A = electric current, then :

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