TD15 : Induction électromagnétique - Physique

TD15 : Induction électromagnétique
Exercice 1     
      ~ B          
z
y
x
~
B
b
aα
a
b
b
a
a
a
Exercice 2     
~
B~
B~
B
~
B
Exercice 3      
                diamagnétique
Exercice 4    
          ~ B(t) = B0(ω0t)~ez 
      U       
      V
r
~
B
~ez
U
Exercice 5     
          r n        i
   B=µ0ni       
         r n
Exercice 6   
       I  f  
 I0              
        ~ B=µ0I
πD ~eθ       
n= 100                
Exercice 7   
       ~ B=µ0ni~ez µ0= 4π−      n   
      i                   r
                  n r  i
      I              
Exercice 8      ?
              M  
     L1             
u1=U(ωt)       1=U(j ωt)
      u2   C2   
u2=
−kqL2
L1u1
1−x2(1 −k2)
 x=ω
ω0 ω2
0=1
L2C2 k2=M2 L1L2  
 x2=1
1−k2
       k→0      x
i1
L1L2
i2
C2
M
u1u2
Exercice 9    
             R   a    
      i(t) = I(ωt)           B(t) = µ0ni(t)
          e(t)       
  iA(t)  
       PJ(t)     
               P=(µ0nIωS)2
2R  S=πa2/4 
        <2(ωt)>=1
2
     n= −f=ω
2π=  a=  µ0=π×−− R=,    
Exercice 10  
       ω        S   Ox 
N                    
           ~ B=B((ωt)~ex+(ωt)~ey)
θ
R             
           R