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HSC Physics

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  1. Module 5: Advanced Mechanics
    5.1 Projectile Motion
  2. 5.2 Circular Motion
  3. 5.3 Motion in Gravitational Fields
    2 Topics
  4. Module 6: Electromagnetism
    6.1 Charged Particles, Conductors and Electric and Magnetic Fields
  5. 6.2 The Motor Effect
    1 Topic
  6. 6.3 Electromagnetic Induction
  7. 6.4 Applications of the Motor Effect
    1 Topic
  8. Module 7: The Nature of Light
    7.1 Electromagnetic Spectrum
    3 Topics
  9. 7.2 Light: Wave Model
  10. 7.3 Light: Quantum Model
    2 Topics
  11. 7.4 Light and Special Relativity
  12. Module 8: From the Universe to the Atom
    8.1 Origins of the Elements
    5 Topics
  13. 8.2 Structure of the Atom
    3 Topics
  14. 8.3 Quantum Mechanical Nature of the Atom
    2 Topics
  15. 8.4 Properties of the Nucleus
    2 Topics
  16. 8.5 Deep Inside the Atom
    4 Topics

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  • EduKits Education
  • Michael
HSC Physics 5.3 Motion in Gravitational Fields The Motor Effect
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Lesson 3, Topic 1
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The Motor Effect

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Current-carrying conductors in magnetic fields experience a force. This is known as the motor effect.

This force results from the induced magnetic fields of the moving charges interacting with the external magnetic field surrounding the conductor.

The force on a conductor (length L) at angle θ from perpendicular to a magnetic field is given by the following:

F=LI_\perp B = LIB\sin\theta

The right-hand push rule (see right) should be used to determine the direction of the applied force.

  • Max. force is produced where the conductor is perpendicular to the magnetic field
  • There is NO force when the conductor is parallel with the magnetic field, i.e. aligned in the direction of its field lines