A charge of 8.5 × 10–6 C is in an electric field that has a strength of 3.2 × 105 N/C. What is the electric force acting on the charge?

Use the relationship between electric force, charge, and field strength: F = qE. Substituting gives (8.5 × 10⁻⁶ C)(3.2 × 10⁵ N/C) = 27.2 × 10⁻¹ N = 2.72 N. Rounded to two significant figures, the force is 2.7 N, choice B.

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