Page 10 - ศักย์ไฟฟ้า (Electric potential)

7

W = F.S

KQq
W  (r  r )
1
A
r A r 1 A 1

1 1
W  KQq (  )
1
A
r 1 r A

1 1
W  KQq (  )
12
r 2 r 1

1 1
W  KQq (  )
23
r 3 r 2

1 1
W  KQq (  )
nB
r B r n