Fundamental Physics/Electromagnetism

Electromagnet

For a coil of N circular loops made from straight line conductor

$B=LI={\frac {N\mu }{l}}I$

Permanent Electromagnet

Permanent Electromagnet Field		$H={\frac {B}{\mu }}={\frac {\phi }{N\mu }}$
Vector equations		$\nabla \cdot E={\frac {\rho }{\epsilon }}$ $\nabla \times E=-{\frac {\partial }{\partial t}}B$ $\nabla \cdot B=0$ $\nabla \times H=J+{\frac {\partial }{\partial t}}B$

Type classification: this resource is a course.

Subject classification: this is a physics resource.

Subject classification: this is an engineering resource.