Dielectrics

V, E, C

V_{0    ,}  E₀  ,  KC₀

K       K           

2(π)(a)(sigma)KX

(r²)^(3/2)

Electric Dipoles

E.F., Potential Energy, 

E.F.   2kq

         r²

Potential Energy -qr * E

2k(sigma) 

      r        

  KQr  

radius³

2πaK(sigma)

distance

  2KL  

ln(rb/ra)

2K(sigma) * ln(rb/ra)

V=E*D     =     sigma*d    =      Qd

                             Epsilon₀         A*Epsilon₀

u₀INa²

2(x²+a²)^3/2

u₀IN

2a

x=0

B in a solenoid

out?

u₀IN

out=0

u₀Ix

2πr²

u₀I

2πr

F =  u₀I₁I₂

L       2πr  

Note: field only between wires i.e. dough of doughnut

u₀NI

2πr

u₀I

2πr

-BAcos0

 t

WBR²

2

Q=NBA

    R

wBAsin(wt)N

E_max=NBAw

-u₀NA I 

         T

u0L ln(R/r)

2π          

u0IL ln(r/R)

2π          

-BLv

u₀NIAL

F=qvB

F=qE

Magnetic Energy Density

with L

U= B²

     2u₀

*L=2U/I