(a) The direction of the total coulomb force on q if q is negative, q a = q c and both are negative and q b = q c and both are positive.

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Chapter 18, Problem 19CQ

To determine

(a)

The direction of the total coulomb force on q if q is negative, qa=qc and both are negative and qb=qc and both are positive.

To determine

(b)

The direction of the electric field at the center of the square.

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