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Gaya Tarik Menarik / Tolak MenolakF1 = K. q1. q2 /(r1)²
r2 = 1/2 r1
(r2)² = 1/4 (r1)²
F2 = K. q1. q2/(r2)²
F2 = K. q1.q2 / (1/4)(r1)²
F2 = F1/ (1/4)
F2 = 4 F1
Gaya listrik yang terjadi 4 kali semula