Exercice 01 :(Fait en cours)

α α
m= 6.64 ×10−27 kg q = +2e= 3.2×10−19 C
l= 2 m
+q
m= 5 g
α=π
4rad
q
~
E
~
E
η= 1.8×10−5·s r = 2 µm
v= 0.392 mm ·s−1E= 28 kV ·m−1
v= 0.458 mm ·s−1
O

(0,0, a) (0,0,−a)
Oyz
Ez(z)z|z|< a
|z|> a
λ
x2+y2=R2z= 0 M Oz
z
2L λ
y
yL
L→ ∞
z
a
λ
R
σ x