Hot bulb engine
Speech therapy goal bank
The bulb is very hot when lit. The wire inside bulb has what is known as a positive temperature coefficient. When the temperature goes up so does the resistance of the bulb. The resistance of the bulb now has a much higher resistance than when it was cold.
hot′-bulb′ en′gine (hot′bulb′),USA pronunciation. Mechanical Engineeringa low-compression oil engine requiring a heated bulb or cap for ignition.