ballast resistor


Cars & Driving

  • noun a resistor in which the resistance increases as the current passing through it increases, used in motor vehicles to control the output from the coil at high engine speeds and provide a better spark for starting
  • acronymBAL RES


  • A resistor whose characteristics enable it to maintain a steady current throughout a wide range of voltages, making it suitable for use as a current regulator. Seen, for instance, in certain types of lamps, such as fluorescent or mercury.