Electricity intro

Electricity intro - Electricity Electricity April 23, 2007...

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Unformatted text preview: Electricity Electricity April 23, 2007 Applications of Electrostatics Applications Electric Charge Electric Measured in COULOMBS Six million trillion electrons is about - 1 C. Six Six million trillion protons is about + 1 C. Electric Potential Energy Electric Electric Potential Energy Electric This spring has This more SPE when it is compressed it Electric Potential Energy Electric This spring has This more SPE when it is compressed is Likewise, these Likewise, charges will have more potential energy when they are pushed closer are Electric Potential Energy Electric PE equals the amount of work done to PE move a charge from one place to another. Electric Potential Energy Electric Which will have the larger electric Which potential energy? potential Electric Potential Energy Electric A – because it requires work to move it because away from the negative charge. away Electric Potential (volts) Electric EP = work/charge Electric Potential (volts) Electric Example: 1000 joules of work is done to move the charge q from far away to the move place indicated. If q = 10 C, what is the electric potential If at the new location? Electric Potential (volts) Electric Example: 1000 joules of work is done to move the charge q from far away to the place iindicated. ndicated. If q = 10 C, what is the electric potential If at the new location? Voltage = work/charge V = 1000 J/10C = 100 Volts Electric Potential (volts) Electric What if the charge in the previous What problem were now 100 C instead of 10? What would happen to the EP? What Electric Potential (volts) Electric What if the charge in the previous What problem were now 100 C instead of 10? What would happen to the EP? What IT WOULD BE THE SAME!!! Work would also increase Electric Potential (volts) Electric Electric potential Electric is associated with LOCATION, not CHARGE CHARGE Electric Potential vs Potential Energy Energy Which charge has Which more electric potential? potential? Which has more Which potential energy? potential Is 5000 Volts Dangerous? Is Is 5000 Volts Dangerous? Is NOPE! When 1 million When electrons are added to a neutral balloon, it has an electric potential of 5000 volts 5000 Potential Difference (voltage) Potential Difference in electric potential between Difference two points. two Potential Difference (voltage) Potential Difference in electric potential between Difference two points. two Potential difference between A and B is 0 A B Potential Difference (voltage) Potential Difference in electric potential between Difference two points. two Now there is a potential difference A B Potential Difference Potential Batteries provide Batteries potential difference between one end of the circuit and the other circuit Potential Difference Potential Batteries provide Batteries potential difference between one end of the circuit and the other circuit Charges flow from high Charges to low electric potential to Potential Difference (voltage) Potential Why aren’t birds on Why power lines shocked? shocked? Potential Difference (voltage) Potential Why aren’t birds Why on power lines shocked? shocked? The Potential The Difference between their feet is zero! (0 voltage) is Current (I) Current Net flow of electrons ...
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