4/10/12

Energy and Charges

C Block reviewed their lab work and homework from Friday and more time was allotted for practice with electric fields and forces.  The video below is for the practice problem you worked on in class - use it if you get stuck trying to solve that problem.  Tomorrow, we'll move on to electric potential energy, electric potential and potential difference.





B Block worked on their capacitor lab and will get more time to finish up tomorrow.  Capacitors store charge and discharge when the right signal is given.  The RC- time constant reflects the rapidity of the charge/discharge and that is influenced by the size of the resistor and capacitor.  Wiring capacitors in series or parallel also has an effect (by altering the value for the overall capacitance) and you'll see that tomorrow.  The write-ups will be due on Friday, so you might want to make sure to read the capacitors section in this chapter before scripting the conclusion section.

E Block took on the topic of batteries, today.  Batteries are sources of potential difference in a circuit.  They promote charge flow