Consider two identical 84 microcoulomb point charges placed, Ask an Expert

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Consider two identical +84 microcoulomb point charges placed 91 cm apart. Let there be a +1 nC (1 nanocoulomb = 1E-9 coulomb) test charge midway between them. Calculate the work (in J) required to move the test charge to a point 6.7 cm closer to either of the charges.

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