Phy 202 & 214 Quiz 16 February 15, 2008

Here are three circuits labeled A, B, and C. All the long bulbs, capacitors, and batteries are identical, and are like the equipment you used in class. The capacitors are initially uncharged. In each circuit the batteries are connected for a short time T and then disconnected. The time T is only twenty percent of the total charging time through a single long bulb, so that the bulb brightness doesn't change much during the time T.

(a) In which circuit (A, B, or Q does the capacitor now have the most charge? Explain.

(b) In which circuit (A, B, or Q does the capacitor now have the least charge? Explain.