#induction_coil__inductioncoil  a coil for producing a high voltage from a low-voltage source
  supertype:  #coil  reactor consisting of a spiral of insulated wire that introduces inductance into a circuit
  part:  #spark_gap
  part of:  #transformer
  subtype:  #ignition_coil  an induction coil that converts current from a battery into the high-voltage current required by spark plugs
  subtype:  #spark_coil__sparkcoil  an induction coil used to create sparks

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