兩點電荷靜電力量值?

(15) Fa : Fb = ?

Fa = Fb

= 2kQ^2/(3r)^2

= 2kQ^2/9r^2

Fa : Fb = 1 : 1 = (2)



(16) (E2, V2) = ?

E = F/Q' = kQ/R^2

V = kQ/R



E2 = kQ/(3R)^2 = kQ/9R^2 = E/9

V2 = kQ/3R = V/3


=> (E2, V2) = (E/9, V/3) = (1)