Electric motor

• What concept describes the force experienced by a current-carrying wire in a magnetic field?

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

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

  Using Fleming's left-hand rule
• If the current in a wire is reversed, what happens to the direction of the force experienced by the wire?

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

  The coil experiences an upwards force on one side and a downwards force on the other, causing it to spin clockwise
• What occurs when the coil is rotated by 180 degrees?

  The current direction in the coil reverses, causing the forces to swap direction
• What is the consequence of the forces swapping direction after a 180-degree rotation of the coil?

  The coil will start turning in the opposite direction
• Why would a coil just keep flipping back and forth without turning 360 degrees?

  Because the forces keep swapping directions without a consistent rotation
• How can the issue of the coil flipping back and forth be resolved?

  By changing the direction of the current every half turn
• What device is used to change the direction of the current every half turn in a motor?

  A split ring commutator
• What is the function of the split ring commutator in an electric motor?

  It swaps the positive and negative connections every half turn
• What is the result of the split ring commutator's function on the coil's rotation?

  The coil will continue to rotate in the same direction
• How does the current flow in relation to the split ring commutator?

  The current flows in from the positive terminal, around the coil, and out through the negative terminal
• Why is the concept of creating spinning motion using electricity significant in engineering?

  It is used in almost all motors, from fans to vehicles to hard drives
• What are some ways to increase the speed of rotation in an electric motor?

  By increasing the current, adding more turns to the coil, or increasing the magnetic flux density
• What is one method to increase the speed of rotation in an electric motor?

  Increasing the current passing through the wire
• How can adding more turns to the coil affect the motor's performance?

  It can increase the speed of rotation
• What effect does increasing the magnetic flux density have on an electric motor?

  It can increase the speed of the rotations