Magnetic Fields Produced by Current-Carrying Wires and Solenoids (HSC SSCE Physics): Flashcards

Hans Christian Øersted (1819)

$B = \frac{\mu_0 I}{2\pi r}$

$4\pi \times 10^{-7}$ T m A$^{-1}$

Tesla (T)

Thumb along current; fingers curl in field direction

Inversely proportional to distance ($\frac{1}{r}$)

Coil of wire wound into cylindrical shape

$B = \frac{\mu_0 N I}{L}$

Bar magnet (has north and south poles)

$\frac{N}{L}$ (number of turns per unit length)