If a = 3.0 mm, b = 4.0 mm, Q1 = ?60 nC, Q2 = 80 nC, and q = 30 nC in the figure, what is the magnitude of the electric force on q?
A. 1.4 N
B. 1.0 N
C. 1.7 N
D. 2.0 N
E. 0.50 N
Answer: B
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