Electric Potential Energy. Electric Charge  Measured in COULOMBS  Six million trillion electrons is about - 1 C.  Six million trillion protons is about.

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Presentation transcript:

Electric Potential Energy

Electric Charge  Measured in COULOMBS  Six million trillion electrons is about - 1 C.  Six million trillion protons is about + 1 C.

Electric Potential Energy

 This spring has more SPE when it is compressed

Electric Potential Energy  This spring has more PE when it is compressed  Likewise, these charges will have more potential energy when they are pushed closer

Electric Potential Energy  PE equals the amount of work done to move a charge from one place to another.

Electric Potential Energy  Which will have the larger electric potential energy?

Electric Potential Energy  A – because it requires work to move it away from the negative charge.

Electric Potential (volts)  EP = work/charge

Electric Potential (volts)  Example: 1000 joules of work is done to move the charge q from far away to the place indicated. If q = 10 C, what is the electric potential at the new location?

Electric Potential (volts)  Example: 1000 joules of work is done to move the charge q from far away to the place indicated. If q = 10 C, what is the electric potential at the new location?  Voltage = work/charge  V = 1000 J/10C = 100 Volts

Electric Potential (volts)  What if the charge in the previous problem were now 100 C instead of 10? What would happen to the EP?

Electric Potential (volts)  What if the charge in the previous problem were now 100 C instead of 10? What would happen to the EP?  IT WOULD BE THE SAME!!!  Work would also increase

Electric Potential (volts)  Electric potential is associated with LOCATION, not CHARGE

Electric Potential vs Potential Energy  Which charge has more electric potential?  Which has more potential energy?

Is 5000 Volts Dangerous?

 NOPE!  When 1 million electrons are added to a neutral balloon, it has an electric potential of 5000 volts

Potential Difference (voltage)  Difference in electric potential between two points.

Potential Difference (voltage)  Difference in electric potential between two points.  Potential difference between A and B is 0 A B

Potential Difference (voltage)  Difference in electric potential between two points.  Now there is a potential difference A B

Potential Difference  Batteries provide potential difference between one end of the circuit and the other

Potential Difference  Batteries provide potential difference between one end of the circuit and the other  Charges flow from high to low electric potential

Potential Difference (voltage)  Potential difference = difference in PE (J) (V)___________________ charge (C)