1. 8.1 Electric Potential Energy & Voltage
Electrochemical cells change chemical energy into electrical energy.
Connecting cells together makes batteries.
The ends of batteries are terminals
– connecting to them allows electrons to flow from the battery through a device that converts electric energy into other forms.
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Electric Energy
Electric energy can do work.
Electric energy that is stored = potential energy
Electric energy that is moving = kinetic energy
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4. Electric Potential Difference
Voltage = Amount of electric potential energy per coulomb of charge
A.K.A. potential difference
measured with a voltmeter.
Remember: Extra electrons will move to a location where there is less of them
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Producing Voltage
Electrodes in an electrolyte chemically react to produce electrons
There is a difference in charges on each electrode.
This creates a potential difference.
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7. Sources of Electricity
Friction
Thermocouples
Photo-electric cells
Piezoelectric
crystals
Generators
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Take the Section 8.1 Quiz