Methods of Producing EMF Flashcards
What are 6 methods of producing EMF?
- Chemical
- Heat
- Pressure
- Light
- Magnetic
- Static
What is the piezoelectric effect?
When pressure is applied to certain objects a voltage is developed across the object.
What is the Seebeck effect?
A heat applied to two dissimilar metals fused together developes a voltage difference between the junction of fused metals and a separated “cold” connection to a circuit.
Batteries are considered a constant “_____” source.
Voltage.
What type of fuel cell is the most successsful?
Cells which use hydrogen and oxygen.
Emf generated through thermocouples is generally used for?
Temperature controls.
The piezoelectric effect only occurs in “_____” materials.
What is the most common material used which experiences this phenomenon?
Non conductive.
Quartz.
What are the main advantages of solar generation?
What is the main disadvantage?
- No moving parts
- Little maintenance
- No waste.
- High cost.
What is the least common method of producing EMF?
Electrostatics. (triboelectric charging)
A Van de graff generator is known as a constant “_____” device.
Current.
