Motor Effect

• A wire carrying a current through a magnetic field will feel a force acting on it = motor effect
• Direction of the force can be determined using Flemings left hand rule

  
• The size of the force depends on:

  • size of the current - increasing current = force on wire.
  • strength of magnetic field - stronger magnet = increase force on wire.
  • length of wire in field - increasing length of wire = increase force (multiple loops of wire).
• Equation:

  • F = BIl
  • F = Force in N, B = Magnetic field in strength in T (Tesla), I = Current in A, l = length in m