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Electrostatic Potential and Capacitance
Question
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What is the work done in moving a test charge q through a distance of 1 cm along the equatorial axis of an electric dipole?

Answer

Work done is given by,
                       W = qV
Since, the equitorial plane is also equipotential, we have,
                        Veq=0

Therefore, work done in moving a positive test charge q through a distance of 1 cm is,
                         W=0

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