What is a characteristic of thermal inkjet nozzles?

What is a characteristic of thermal inkjet nozzles?

• The heat creates a bubble of steam in the chamber.
• Heat is applied to the ink reservoir of each nozzle.
• The vibration of the crystal controls the flow of ink.
• A charge is applied to the printhead.
  

  Explanation: Thermal inkjet nozzles work based on heat creating steam bubbles. Piezoelectric inkjet nozzles work based on vibration of crystals.