ELECTROMOTIVE FORCE ---- EMF CHAPTER 6. EMF-BATTERY.

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Presentation transcript:

ELECTROMOTIVE FORCE ---- EMF CHAPTER 6

EMF-BATTERY

UNDERSTANDING OF EMF A battery provides a potential difference called an electromotive force or EMF. This is not truly a force, but rather a potential difference. It is called an emf for historical reasons. There is a gravitational analogy to this process. Raising the potential in a circuit (what the battery does) is like raising a ball to a higher potential. The battery provides a potential which can cause the charges to flow around a circuit.

GRAVITATIONAL ANALOGY

INTERNAL RESISTANCE

EMF’S CALCULATION

CIRCUIT DIAGRAM- (AMPERE-VOLTAGE)

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