Physics

calculate the electric potential at a point P, a distance of 1m from either two charges of +10uC and -5uC which are 10cm apart. Calculate also the potential energy of a +2uC charge placed at a point,P

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  1. The nice thing about potentials is that they add (as scalars, not vectors).
    Therefore if you need the potential due to two different charges,
    each is k Q/R
    so k (10*10^-6)/1 - k (5*10^-6)/1

    then for part B multiply the potential, which is potential energy per unit charge by the charge 2*10^-6

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