Fundamental Physics/Electromagnetic field

Electromagnetic field

When connect electric conductor with a voltage source , the current flows through conductor creates magnetic field different shapes for different arrangements . Field of Electromaget lines running from north pole to south pole include

Intensity of electromagnetic field

The strength of magnetic field can be calculated by Ampere's law

${\displaystyle B=LI}$
 For a straight line conductor ${\displaystyle B=LI={\frac {\mu }{2\pi r}}I}$ For a circular loop made from straight line conductor ${\displaystyle B=LI={\frac {\mu }{2r}}I}$ For a coil of N circular loops made from straight line conductor ${\displaystyle B=LI={\frac {N\mu }{l}}I}$${\displaystyle \phi =-NB}$${\displaystyle H={\frac {B}{\mu }}}$

With

Magnetic Field B
Induced magnetic field Φ
Magnetization Field H