How the Electric Motor Works

• What concept explains the force on a current-carrying wire in a magnetic field?

  The motor effect
• What determines the direction of the force on a wire in a magnetic field?

  The directions of the magnetic field and current
• How can you determine the direction of the force on a wire?

  Using Fleming's left-hand rule
• What happens to the force direction if the current direction is reversed?

  The force direction also reverses
• What happens to the coil when the current flows from the positive terminal to the negative terminal?

  The coil starts to spin clockwise
• What occurs when the coil is rotated by 180 degrees?

  The current direction in the coil reverses
• What is the effect of reversing the current direction on the forces acting on the coil?

  The forces on each side of the coil swap direction
• Why does the coil not rotate 360 degrees without intervention?

  It keeps flipping back and forth
• What device is used to change the direction of the current every half turn?

  A split ring commutator
• How does the split ring commutator affect the coil's rotation?

  It ensures the coil rotates in the same direction
• What happens when the positive terminal is connected to one side of the commutator?

  The current flows around the coil
• What is one application of electric motors mentioned in the video?

  Fans
• How can the speed of the motor's rotation be increased?

  By increasing the current, adding more turns, or using stronger magnets
• What is the relationship between the number of turns in the coil and the motor's power?

  More turns increase the motor's power
• What is the role of magnetic flux density in motor operation?

  It affects the strength of the motor
• What are the key components of an electric motor's operation?

  • Current-carrying wire in a magnetic field
  • Motor effect
  • Fleming's left-hand rule
  • Split ring commutator
  • Direction of current and forces
• What are the methods to increase the power of an electric motor?

  1. Increase the current
  2. Add more turns to the coil
  3. Increase magnetic flux density with stronger magnets