First page Back Continue Last page Overview Image
- PHY102 Physics II © Dr.Cem Özdoğan
- Electric circuits connect power supplies to loads.
- It can be evaluated in two different ways;
- Electric field is needed to produce electrostatic force, FE, on charges
- Electrical energy should be supplied (energy is needed to do work on charge carriers)
- Emf devices can be considered as a “charge pump’’ that moves charges from lower potential to higher one in order to produce a steady flow of charge through a circuit.
- Some emf devices;
- Battery
- Generator
- Solar Cells
- Fuel Cells
- ...
- All perform the same function;
- They do work on charge carriers and thus maintain a potential difference between their terminals.
- How a constant current (steady state flow of charge carriers) is maintained through the load or device?
- The source of energy is called Electromotive force (emf), ξ, and the device which supply emf is called emf device.