#resistor__resistance  an electrical device that resists the flow of electrical current
  supertype:  electrical_device  a device that produces or is powered by electricity
  part of:  electrical_circuit
  subtype:  ballast_resistor__ballastresistor__barretter  a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations)
  subtype:  potential_divider__potentialdivider__voltage_divider__voltagedivider  resistors connected in series across a voltage source; used to obtain a desired fraction of the voltage
     subtype:  potentiometer.potential_divider__pot  a resistor with three terminals, the third being an adjustable center terminal; used to adjust voltages in radios and TV sets
  subtype:  rheostat__variable_resistor  resistor for regulating current
     subtype:  dimmer  a rheostat that varies the current through an electric light in order to control the level of illumination

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