The fixed bias circuit is modified by attaching an external resistor to the emitter. There is also a smaller negative feedback introduced by the emitter resistor R. The collector voltage drops because of reduced resistance from collector to emitter. The sensor employs an emitter and a collector. Polonium is dangerous as an alpha particle emitter. The lime industry is a significant carbon dioxide emitter. It is a strong emitter of gamma radiation. This means that a good absorber is a good emitter. China is the world's largest carbon dioxide emitter. The electric field created by the emitter and the accelerator then accelerates the ions. Further developments must be made to the absorber/emitter and PV cell. The converter is heated by the radiation from the emitter. They developed and patented the first practical surface drip irrigation emitter. Together they developed and patented the first practical surface drip irrigation emitter. Charge will flow between emitter and collector terminals depending on the current in the base.