Two Electrons Are $20.0 \mathrm {~mm}$ Apart at Closest Approach

question 15

Multiple Choice

Two electrons are $20.0 \mathrm {~mm}$ apart at closest approach. What is the magnitude of the maximum electric force that they exert on each other?
(e = 1.60 × 10^-19 C, k = 1/4πε₀ = 9.0 10⁹ N ∙ m²/C²)

• A) 5.8 × 10^-25 N
• B) 2.3 × 10¹⁰ N
• C) 2.3 N
• D) 5.8 × 10^-27 N

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