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Review

Review. Charges have _________________________ associated with their position in an ____________________________ Charges that are moving naturally in an ____________________, lose / gain _______________________________ _____________________ characterizes the charge

angelica-saunders
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Review

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  1. Review Charges have _________________________ associated with their position in an ____________________________ Charges that are moving naturally in an ____________________, lose / gain _______________________________ _____________________ characterizes the charge Ratio of __________________ per charge is called _____________________ Ratio of ___________________ per charge is called __________________________________________________ Positive charge naturally moves through a _____________________________ Negative charge naturally moves through a ____________________________

  2. Unit Play

  3. Potential in EF of a point charge White board practice: + 5.0 C 2.0 m A B 1.0 m Find the magnitude of the field at point A and at point B. Potential energy of a +2.0nC charge at each point (refer to the analogy with PEg) Find the change of EPE as the charge moves

  4. Potential in EF of a point charge White board practice: + 5.0 C 2.0 m A B 1.0 m Determine potential difference between the two points. Make a conclusion about the potential (magnitude) as the distance to the charge increases / decreases. As you get closer to the positive charge, V is ______________________ As you move away from the positive charge, V is ___________________

  5. Potential in EF of a point charge White board practice: - 5.0 C 2.0 m A B 1.0 m Find the magnitude of the field at point A and at point B. Find the change of EPE for a +2nC charge as it moves:

  6. Potential in EF of a point charge White board practice: - 5.0 C 2.0 m A B 1.0 m Determine potential difference between the two points. Make a conclusion about the potential (magnitude) as the distance to the charge increases / decreases. As you get closer to the positive charge, V is ______________________ As you move away from the positive charge, V is ___________________

  7. Deriving the formula for potential near a point charge Potential around a positive charge is _________________ Potential around a negative charge is ________________

  8. Potential is a scalar! 2.0 m Find the potential midway between the two charges: +2.0 nC and – 4.0 nC -2.0 nC and +4.0 nC -6.0 nC and +6.0nC

  9. Midpoint problems revisited 2.0 m Is there a net force on the point between the two charges? Is there a net field between the two charges? Is there a net potential between the two charges?

  10. Midpoint problems revisited 2.0 m If you know the net field between the charges, you can predict _________________________________________________________________ If you know the net potential between the charges, you can predict _________________________________________________________________

  11. Zero V vs. ES equilibrium What can you say about the two charges if you know that Vnet = 0 at midpoint? In that case, what can you say about the net field? What will happen to a ‘stray’ charge if it ends up at that point?

  12. Find the point where Enet and Vnet are 0 2.0 m Charges: +1.0 nC and – 4.0 nC

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