Energi Potensial Listrik . Mohon bantuanya kak , Nuhun

MEDAN LISTRIK STATIS
• potensial listrik

r = 9 cm
ra = 3 cm. Qa = 25 μC
rb = 6 cm. Qb = __?
Vc = 0

ra + rb = r
rb = r - ra
rb = 9 - 3 = 6 cm

potensial listrik
V = k Q / r.. besaran skalar

Vc = Va + Vb
0 = Va + Vb
Vb = - Va
k Qb / rb = - k Qa / ra
Qb / rb = - Qa / ra
Qb = - (rb / ra) Qa
Qb = - (6/3) × (25 μC)
Qb = -2 × (25 μC)
Qb = - 50 μC ← jwb