JAMB Physics 2021 Objective — Question 12
Question 12 of 40 from the Joint Admissions and Matriculation Board (JAMB) Physics 2021 Objective paper, with the correct answer and a full explanation.
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Force of repulsion between 4μC and 5μC charges 0.02 m apart:
- A. 9×10² N
- B. 4.5×10² NCorrect
- C. 1.8×10³ N
- D. 2.7×10³ N
Explanation
F=kq₁q₂/r²=9×10⁹×20×10⁻¹²/4×10⁻⁴=450 N=4.5×10² N.
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