Motor effect

• What is the motor effect?

  The interaction of magnetic fields causing force
• What can you calculate using the motor effect?

  The size of the force generated
• What rule is used to determine the direction of the force in the motor effect?

  Fleming's left hand rule
• Who is the target audience for this video?

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

  The wire experiences a force
• In which direction does the force act when a wire is placed in a magnetic field?

  Upward direction
• What is the equation to calculate the size of the force?

  Force = magnetic flux density × current × length
• What units are used for magnetic flux density?

  Tesla
• What does the magnetic flux density measure?

  The strength of the magnetic field
• 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 the wire?

  $0.19 \text{ Newtons}$
• What factors affect the size of the force in the motor effect?

  Magnetic flux density, current, length
• How do you use Fleming's left hand rule?

  • Thumb: direction of motion (force)
  • First finger: direction of magnetic field (N to S)
  • Second finger: direction of conventional current (positive to negative)
• 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 about the motor effect?

  • Interaction of magnetic fields causes force
  • Force can be calculated using specific equation
  • Direction determined by Fleming's left hand rule
  • Factors affecting force: magnetic flux density, current, length