If a = 60 cm, b = 80 cm, Q = ?4.0 nC, and q = 1.5 nC, what is the magnitude of the electric field at point P?
A. 68 N/C
B. 72 N/C
C. 77 N/C
D. 82 N/C
E. 120 N/C
Answer: A
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