The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C. What is the charge on the object? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) -4.5 nC
B) +4.5 nC
C) -5.0 nC
D) +5.0 nC
Answer: A
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