Chapter 15 Videos Quiz Wednesday 6/25/14 June 24, 2014- Capacitor device to store chargeo 2 reasons for the ball to move attraction and repulsiono Positive plate = higher voltage- Piezoelectric sparker bone – under pressure distributes a charge o Ex. Outer and inner portion of vertebrae Chapter 16 Electric Potential, Energy, and Capacitance16.1- 16.5 ish in the book but 16.1-16.2 in the powerpoint he gave in class16.1 - In the picture above, in part B as you move from the ground to the air, there is an increase in gravitational potential energy = you did work to increase the potential energy of the charge - In the picture above, in part A, you start with a positive test charge and because its positive it doesn’t want to be near the positive plate because it is getting repelled and it is attracted to the negative plate = you do work to move the test charge toward the positive plate- : change in potential energy- : electric potential differenceUnit of electric potential difference Volt, V- In the equation above, when being applied to parallel plate capacitors, the electric potential difference is really just Ed- An electric field is uniform and electric field lines always come out of the positive plate or charge- Electric potential difference of a point charge:16.2 Equipotential Surfaces and the Electric Field- In this figure to the left, Vb has a higher voltage because it is closest to the positive plate, which has the highest voltage - Everything at Vb has the same voltage because it is the same distance away from the positive plate at any point in the Vb equipotential surface takes no work to move a test charge from one area to the next on VbWalk through problems: Chapter 15 Number 6:Chapter 15 number
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