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

$B=LI$

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

With

Magnetic Field B

Induced magnetic field Φ

Magnetization Field H