Hall Effect

Key notes

  • The Hall Effect is the production of a transverse voltage across a conductor or semiconductor carrying current in a magnetic field.
  • The magnetic field must be perpendicular to the current.

  • The Hall voltage depends on:

    • Magnetic-field strength.
    • Current.
    • Charge-carrier density.
    • Thickness of the material.

  • Applications include:

    • Magnetic-field sensors.
    • Current measurement.
    • Position and speed sensors.
    • Brushless DC motors.
    • Automobile systems.
  • It helps determine the sign and type of charge carriers.
  • The effect was discovered by Edwin Hall in 1879.
  • Hall sensors are solid-state devices and can operate without physical contact.
    • D. Chemical formula of water
      Answer: A