alleryIn SI units, the magnitude of the elementary charge e is approximately
A1.6 × 10⁻¹⁹ C
B1.6 × 10⁻¹⁰ C
C9.0 × 10⁹ C
D8.85 × 10⁻¹² C
Answer & Solution
Correct answer: A. 1.6 × 10⁻¹⁹ C
e ≈ 1.602 × 10⁻¹⁹ C. 9×10⁹ is Coulomb's constant k, and 8.85×10⁻¹² is the permittivity of free space ε₀.
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