Fundamental Physics/Electromagnetism/Electromagnetic induction

Electromagnetic induction takes place in a circular loop and a coil of N circular loops . According to Faraday, change in magnetic field will produce electric potential

$\epsilon =-{\frac {d}{dt}}\phi$

Conductors	Configurations	Mathematical Formulas
For a single circular loop		$B=LI={\frac {\mu }{2r}}I$ $V={\frac {dB}{dt}}=L{\frac {dI}{dt}}$
Coil of N circular loops		$B=LI={\frac {N\mu }{l}}I$ $V={\frac {dB}{dt}}=L{\frac {dI}{dt}}$ $\phi =-NB=-NLI$ $\epsilon =-{\frac {d\phi }{dt}}=-N{\frac {dB}{dt}}=-NL{\frac {dI}{dt}}$