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A 3*10°C charge is at (-1, 0).
A -4*10°C charge is at (2, 0).
(a) Calculate the field at the origin.
(b) Calculate the voltage at the origin.
(c) If an electron is placed at the origin, what
force would act on it? What PE would it
have?
Draw the field lines and equipotentials for
question 1. Make them as accurate as you can.

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