CC1 PHYS1 2021-2022-1

+σ
+σ
λ
2α
λ

φ
r θ
(~ur, ~uθ)
~
E=Er(r, θ)~ur+Eθ(r, θ)~uθ

λ2α
E=λsinα
2π0R
λ
α=±π E = 0
E=λRcosα
20r2=λzR 20r3=λzR
20(R2+z2)3/2
+σ
~
E=σ
20~uz
+σ
~
E(M1) = −σ
0~uz
~
E(M2) = ~ 0
~
E(M3) = σ
0~uz