The Motor Effect

• When a current carrying wire is put between magnetic poles, the magnetic field around interacts with the magnetic field it’s been placed in. This causes the magnet to exert a force on eachother and causes the wire to move
• To experience the full force, the wife has to be at 90° to the magnetic field. If the wire runs parallel to the magnetic field, it won’t experience any force at all
• The magnitude of the force increases with the strength of the magnetic field
• The force also increases with the amount of current passing through the conductor
• The Motor effect

  
• The size of force can be found ysing the equation F=BIL
• The direction of the force can be found using Flemings left hand rule.

  • First finger goes in the direction of the field
  • The second finger goes in the direction of the current
  • Your thumb goes in the direction of the force

  This shows that if either the current or the magnetic field is reversed, the direction of the force will also be reversed