右みぎねじの法ほう則そく

expression, noun

corkscrew rule; right-hand screw rule

A physics mnemonic: when a right-handed screw is turned clockwise, it advances forward. Used to remember the direction of magnetic fields, angular momentum, etc.

• 右みぎねじの法ほう則そくを使つかうと、電でん流りゅうの向むきから磁じ界かいの向むきがわかる。

  Using the corkscrew rule, you can determine the direction of the magnetic field from the direction of the current.