Pertanyaan no 54, dijawab menggunakan cara..

LISTRIK STATIS

Qp = 36 uC
Qr = 81 uC
r = 20 cm
rr = __?

r = rp + rq = 20 cm

rp / rr = √Qr / √Qp
rp / rr = √36 / √81
rp / rr = 6 / 9

rr = 9/15 × (20 cm)
rr = 12 cm ← jwb