Cours de Physique de Spé

Φ(t)
e i
Φ( ~ B) = s~
B·~ dS
Φ~ B=xB·dS ·cos α
α~ B, ~ dS
Φ(t)
B(t)I(t)
S(t)~ B
α(t)~ B
eΦ(t)
i e =R·i R
e
e=−dΦ(t)
dt Φ(t)t
e=−∆Φ
∆t=−Φf·Φi tf·ti

~
Em
i
l
MN P Q ~v
~
B
G
G
B
vFm
Em
i
P C Q
MDN
v= 0 i= 0
i
~v ~ B
~
Fm=q~v ∧~ B
~
FmC→D
i D →C~
Fm~ Fm=~ Fe
q ~re ∧~ B=q~ Em⇒~re ∧~ B=~ Em
~
Em=~v ∧~ B
e
e=Z~ Em·~ dl
~
Em

ω
α=α(t) = ω·t
R
Bv
z
Em
O R
M
w
~
EmO R
~
Em~v ∧~ B
v·~ev∧B·~ez
vB ~eθ∧~ez
~
Em=vB ~er
→~ Em
VO−VA=RA
O~
Em·~ dl
=RR
OEmdr
=RR
OrωBdr
VO−VA=ωR2
2B
M~ B
dWm=1
2µ0
B2dτ
Wm=1
2µ0y
τ
B2dτ
µ0= 4π·10−7S.I.
µ=µr·µ0(µr≥1)

µr= 1 ⇒µ=µ0
µ
Wm
R1< r < R2B(r) = µ0NI
2πr
Wm=1
1µ0tµ2
0N2I2
4π2r2r dr dθ dz
⇒Wm=µ0N2I2
8π2R2π
0dθ Rh 0dz RR2 R1
1
rdr
Wm=µ0N2I2
4πh·ln R2 R1