page_title: FBI mnemonics
section_title: Prediction of direction of field ('B')
hierarchical_section_title: FBI mnemonics / Other frequently confused rules / Prediction of direction of field ('B')
caption_attribution_description: Polski: Rysunek przedstawiający regułę prawej dłoni.
context_page_description: The various FBI mnemonics show the direction of the force on a conductor carrying a current in a magnetic field as predicted by Fleming's left hand rule for motors and Faraday's law of induction.
  Other mnemonics exist that use a right hand rule for predicting resulting motion from a preexisting current and field.
context_section_description: The rules above are usually used to predict 'F' based upon 'B' and 'I' - the force on a moving charge when moving through a field, whether or not the charge is carried in a wire. However, this rule should not be confused with a different right hand grip rule for the prediction of the direction of a field ('B') produced by current ('I') traveling through a wire.
caption: Prediction of direction of field ('B').
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