What is the magnitude of the force on an electron in a uniform electric field of 2.0 × 10⁴ N/C (e = 1.6 × 10⁻¹⁹ C)?
Correct answer A. 3.2 × 10⁻¹⁵ N
Explanation
F = eE = 1.6 × 10⁻¹⁹ × 2.0 × 10⁴ = 3.2 × 10⁻¹⁵ N. The force on the negative electron acts opposite to the field direction.
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