Electromagnetism and the motor effect

• What is created around a wire with a current passing through it?

  A magnetic field
• What does a moving charge create?

  A magnetic field
• What happens when a current flows through a straight conductor?

  • A magnetic field is created around it.
  • The field is concentrated in circular loops.
  • The field direction can be determined using the right-hand rule.
• How is the magnetic field around a wire described?

  It consists of concentric circles perpendicular to the wire
• What effect does changing the direction of current have on the magnetic field?

  It changes the direction of the magnetic field
• What is the relationship between current strength and magnetic field strength?

  • The larger the current, the stronger the magnetic field.
  • The closer the wire is to the field, the stronger the field.
• What is the right-hand rule used for?

  To determine the direction of the magnetic field
• What happens when a current-carrying conductor is placed between magnetic poles?

  A force acts on the wire
• What is the motor effect?

  • A current in a magnetic field experiences a force.
  • The direction of the force can be determined using the right-hand rule.
• What is the result of the interaction between two magnetic fields?

  A force on the wire
• How does the angle of the wire affect the force experienced?

  The force is maximum at 90 degrees
• What is required for a wire to experience maximum force in a magnetic field?

  The wire must be at a right angle to the field
• What factors affect the force on a current-carrying wire in a magnetic field?

  • Strength of the magnetic field
  • Amount of current flowing through the wire
  • Angle between the wire and the magnetic field
• What happens if the wire runs parallel to the magnetic field?

  No force is experienced by the wire
• What is the effect of increasing the current in the wire?

  The force on the wire increases
• How does the distance from the wire affect the magnetic field strength?

  The strength decreases as distance increases
• What is the significance of the right-hand rule in electromagnetism?

  • It helps determine the direction of the magnetic field.
  • It is essential for understanding the motor effect.
• What is the relationship between the magnetic field lines and the strength of the field?

  Closer lines indicate a stronger field
• What happens to the magnetic field when the current is reversed?

  The direction of the magnetic field reverses
• How do magnetic fields interact with each other?

  They can add up or push against each other
• What is the effect of the angle of the wire on the force experienced in a magnetic field?

  • Maximum force at 90 degrees.
  • No force at 0 degrees.
  • Varies between these angles.
• What is the condition for a wire to experience a force in a magnetic field?

  The wire must carry a current
• What is the role of the magnetic field in the motor effect?

  It interacts with the current to produce force
• How does the strength of the magnetic field affect the force on the wire?

  A stronger field results in a greater force
• What are the conditions for maximum force on a current-carrying wire in a magnetic field?

  • The wire must be perpendicular to the field.
  • The current must be at its maximum.
  • The magnetic field must be strong.
• What is the effect of a magnetic field on a current-carrying conductor?

  It exerts a force on the conductor
• What happens when the wire runs along the magnetic field lines?

  No force is experienced by the wire
• How does the angle between the wire and the magnetic field affect the force?

  The force varies with the angle
• What are the key factors that determine the force on a wire in a magnetic field?

  • Current strength
  • Magnetic field strength
  • Angle between wire and field
• What happens to the force in a magnetic field if the angle is zero?

  It won't experience any force at all
• How does the force behave when angles are between zero and ninety degrees?

  It feels some force
• In what direction does the force always act in relation to the magnetic field?

  In the same direction as the magnetic field
• What effect does changing the direction of the magnetic field or current have?

  It changes the direction of the force
• What is Fleming's left-hand rule used for?

  • To find the direction of the force on a current-carrying conductor
  • Uses the left hand to determine direction
• Which hand is used in Fleming's left-hand rule?

  Left hand
• How do you position your fingers to find the direction of the force using Fleming's left-hand rule?

  First finger points magnetic field, second finger current
• What does the thumb represent in Fleming's left-hand rule?

  Direction of the force
• What does the size of the force depend on in a magnetic field?

  On the magnetic flux density, current size, and length of conductor
• What is magnetic flux density?

  How many field lines are in a region
• What does the size of the current through the conductor affect?

  It affects the size of the force