Question

如圖1-5-5所示，電場(chǎng)中某一條電場(chǎng)線為一直線,線上有A、B、C三個(gè)點(diǎn).電荷q₁=10^-8 C從B點(diǎn)移到A點(diǎn)時(shí)電場(chǎng)力做了10^-7 J的功；電荷q₂=-10^-8 C,在B點(diǎn)的電勢(shì)能比在C點(diǎn)時(shí)大10^-7 J,那么:

圖1-5-5

(1)比較A、B、C三點(diǎn)的電勢(shì)高低,由高到低的排序是__________；

(2)A、C兩點(diǎn)間的電勢(shì)差是__________ V；

(3)若設(shè)B點(diǎn)的電勢(shì)為零,電荷q₂在A點(diǎn)的電勢(shì)能是__________ J.

Answer 1

(1)φ_c＞φ_b＞φ_a

(2)-20

(3)10^-7