The Motor Effect

• What is the motor effect?

  The interaction of magnetic fields causing force
• How do you calculate the size of the force generated by the motor effect?

  Using the equation: force = magnetic flux density × current × length
• What does Fleming's left hand rule help determine?

  The direction of the force on the wire
• Who is the target audience for this video lesson?

  High-tier students only
• What happens when a wire carrying current is placed in a magnetic field?

  The wire experiences a force due to interaction
• What direction does the force act on the wire in the given scenario?

  The force acts in the upward direction
• What is the equation to calculate the force acting on a wire?

  Force = magnetic flux density × current × length
• If a wire has a length of 2.5 meters, current of 1.5 amperes, and magnetic flux density of 0.05 Tesla, what is the force acting on it?

  0.19 Newtons
• What factors affect the size of the force on the wire?

  Magnetic flux density, current, and length
• What does the magnetic flux density measure?

  The strength of the magnetic field
• How do you use Fleming's left hand rule?

  Align thumb, first finger, and second finger
• In Fleming's left hand rule, what does the first finger represent?

  The direction of the magnetic field
• In Fleming's left hand rule, what does the second finger represent?

  The direction of the conventional current
• What does the thumb represent in Fleming's left hand rule?

  The direction of the motion or force
• What happens if the conductor is parallel to the magnetic field?

  It will not experience a force
• What happens if the conductor is at right angles to the magnetic field?

  It will experience a force
• What are the key points of the motor effect?

  • Interaction of magnetic fields causes force
  • Force direction determined by Fleming's left hand rule
  • Force size calculated using the equation
• What is the equation for calculating force in the motor effect?

  • Force (N) = Magnetic flux density (T) × Current (A) × Length (m)
• What are the factors affecting the size of the force in the motor effect?

  • Magnetic flux density
  • Current
  • Length of the conductor
• How does Fleming's left hand rule work?

  1. Thumb: Direction of motion (force)
  2. First finger: Direction of magnetic field (N to S)
  3. Second finger: Direction of conventional current (positive to negative)