THUMB-AND-FINGER RULE


Meaning of THUMB-AND-FINGER RULE in English

| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷- noun

: either of two statements in electromagnetism: when the fingers of the right hand are bent so that the thumb points in the direction of the decrease in flux in a magnetic circuit, the fingers will point in the direction of the induced voltage in the electric circuit linked with the magnetic circuit; and when the fingers of the right hand are bent so that they follow the direction of the flow of current through a helical or coil conductor, the thumb will point in the direction of the flux through the helix or coil — compare left-hand rule , right-hand rule

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.