Motor effect

• What is the motor effect?

  A current carrying wire in a magnetic field experiences a force
• What happens when a current carrying wire is placed between two magnets?

  The wire experiences a force due to magnetic field interaction
• What angle must the wire be at to experience the full force?

  The wire must be at exactly 90 degrees
• What happens if the wire is at a slight angle to the magnetic field?

  The wire will feel slightly less force
• What is the result if the wire runs in the same direction as the magnetic field?

  The wire will feel no force at all
• What two directions do we need to know to find the direction of the force?

  The direction of the magnetic field and the current
• What rule do we use to determine the direction of the force?

  Fleming's left-hand rule
• How do you position your fingers according to Fleming's left-hand rule?

  Thumb up, first finger forward, second finger out
• What does the first finger represent in Fleming's left-hand rule?

  The direction of the magnetic field
• What does the second finger represent in Fleming's left-hand rule?

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

  The direction of the force felt by the wire
• In the scenario with the horseshoe magnet, what is the orientation of the magnetic field?

  The magnetic field points downwards from north to south
• 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 when the power source is turned on in the horseshoe magnet scenario?

  The rails generate their own magnetic field
• What happens to the force direction if the current direction is reversed?

  The force direction also reverses
• What happens when two wires are connected at one end in a coil setup?

  The coil will start 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 the current direction change on the forces acting on the coil?

  The forces swap direction on each side
• What happens if the coil keeps flipping back and forth?

  It won't complete a full 360-degree rotation
• How can the coil's rotation direction be maintained?

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

  A split ring commutator
• How do we determine the direction of the force in the horseshoe magnet scenario?

  Using Fleming's left-hand rule again
• What does the split ring commutator do?

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

  The coil rotates in the same direction continuously
• How does the current flow in the coil when connected to the commutator?

  From the positive terminal around the coil to the negative terminal
• Why is the concept of creating spinning motion using electricity important?

  It is fundamental in various motor applications
• What are some ways to increase the speed of motor rotations?

  Increase current, add more turns, use stronger magnets
• What is one application of electric motors mentioned in the video?

  Fans
• What is another application of electric motors mentioned in the video?

  Vehicles
• What is a third application of electric motors mentioned in the video?

  Hard drives
• What is the significance of using electricity to create motion in motors?

  It allows for efficient mechanical work
• What is the main takeaway from the video about electric motors?

  They convert electrical energy into mechanical motion
• What is the equation to calculate the strength of the force?

  f = b i l
• What does the variable 'f' represent in the equation?

  Force measured in newtons
• What does the variable 'b' represent in the equation?

  Magnetic flux density in teslas
• What does the variable 'i' represent in the equation?

  Current in amperes
• What does the variable 'l' represent in the equation?

  Length of the wire in meters
• How do you convert 10 centimeters to meters for the calculation?

  Divide by 100 to get 0.1 meters