Besar kuat medan magnet

$B={\displaystyle \frac{{\mu }_o.i}{2\pi .a}}$

${\mu }_o=4\pi \times {10}^{-7}$

i = besar kuat arus

a = jarak ke kawat

$B={\displaystyle \frac{{\mu }_o.i}{2.a}}$

${\mu }_o=4\pi \times {10}^{-7}$

i = besar kuat arus

a = jarak ke kawat

$B={\displaystyle \frac{{\mu }_o.i.a}{2.b^2}}.\sin \theta$

${\mu }_o=4\pi \times {10}^{-7}$

i = besar kuat arus

a = jarak ke kawat

Besar kuat medan magnet pada pusat solenoida

$B=N.{\displaystyle \frac{{\mu }_o.i}{l}}$

Besar kuat medan magnet pada ujung solenioda

$B=N.{\displaystyle \frac{{\mu }_o.i}{2l}}$

${\mu }_o=4\pi \times {10}^{-7}$

N = banyaknya lilitan

i = besar kuat arus

l = panjang solenoida

$B=N.{\displaystyle \frac{{\mu }_o.i}{2\pi .a}}$

$B=N.{\displaystyle \frac{{\mu }_o.i}{\pi .(R_1+R_2)}}$

${\mu }_o=4\pi \times {10}^{-7}$

N = banyaknya lilitan

i = besar kuat arus

a = radius toroida

R₁ = radius dalam toroida

R₂ = radius luar toroida