A-level Physics/Electrons and Photons/Magnetic effects of current

From Wikibooks, the open-content textbooks collection

Jump to: navigation, search

[edit] Fleming's left hand rule

Use your thumb, first and second fingers to point at 90° to each other: like the corner of a box.
First finger: Field
seCond finger: Current
THumb: THrust

[edit] Formula

F = B\,I\,L

F is the force produced, measured in newtons. B is the magnetic field strength (flux density), measured in Tesla. I is the current that the magnetic field is acting on, measured in Amps. L is the length of the electrical wire, measured in metres.

Retrieved from "http://en.wikibooks.org/wiki/A-level_Physics/Electrons_and_Photons/Magnetic_effects_of_current"