q . 1 2 ∆S.
∆=ES∆S, (1)
U12. U=U21 =-U12=-∆φ.
ES= ∆φ/∆S, (2)
ES= dφ/dS. (3)
.. .
, . φ , grad φ. .
= -grad φ. (4)
.. . , .
, . .
.
, , , r . , r,
φ = = q/4πe0 = 1/4πe0q/r. (5)
, . .
,
φ = . (6)
: |
q . 1 2 ∆S.
∆=ES∆S, (1) U12. U=U21 =-U12=-∆φ. ES= ∆φ/∆S, (2) ES= dφ/dS. (3) .. . , . φ , grad φ. .
= -grad φ. (4) .. . , . , . . . , , , r . , r, φ = = q/4πe0 = 1/4πe0q/r. (5) , . . , φ = . (6)
: 2015-05-07; !; : 556 | : : , . |