The motor effect

• What is the motor effect

  . A wire carrying a current creates a magnetic field

  . This can interact with another magnetic field, causes a force that pushes the wire at right angles
• Equation for calculating force of motor effect

  . Force (N) = Magnetic flux X current X Length

  Density (T) (A) (M)
• The equation only applies to A wire which is at right angles to the magnetic field
• Magnetic flux density is a measure of the strength of the magnetic field
• What is Flemings left hand rule

  . Place thumb, first finger, and second ringer so they are at right angles

  . Point first finger in direction of the magnetic field from north to south

  . Point second fingering first finger in direction of conventional current

  . Direction of thumb shows direction of the force
• If the conductor is parallel to the magnetic field it will not experience a force