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Chapters 19 & 20
DC Circuits
Topics:
•
RC Circuits
1
Textbook Choices
I would prefer to buy a textbook …
A. that comes as a single hardback text that
can be used for Phys 151& 152.
B. that comes in a loose leaf format that can be
put into a three ring binder, can be used for
Phys 151& 152, and costs 35% less than the
hardback text.
C. that comes as two paperback volumes, one
for 151 and one for 152. The cost would be
20% more than the hardback text but would
be split over 2 semesters.
Capacitor Combinations
Slide 19-24
Equivalent Capacitance
 = RC
Slide 23-29
Equivalent Capacitance
 = RC
Slide 23-29
Slide 23-29
Slide 23-29
RC Circuits
 = RC
Slide 23-29
RC Circuits
 = RC
Slide 23-29
Slide 23-29
 = RC
Slide 23-29
Clicker Question 2
The following circuits contain capacitors that are charged to 5.0
V. All of the switches are closed at the same time. After 1 second
has passed, which capacitor is charged to the highest voltage?
Slide 23-30
Answer
The following circuits contain capacitors that are charged to 5.0
V. All of the switches are closed at the same time. After 1 second
has passed, which capacitor is charged to the highest voltage?
Slide 23-31
Additional Clicker Questions
2. In the circuit shown below, the switch is initially closed and the
bulb glows brightly. When the switch is opened, what happens
to the brightness of the bulb?
A.
B.
C.
D.
E.
The brightness of the bulb is not affected.
The bulb gets dimmer.
The bulb gets brighter.
The bulb initially brightens, then dims.
The bulb initially dims, then brightens.
Slide 23-39
Answer
2. In the circuit shown below, the switch is initially closed and the
bulb glows brightly. When the switch is opened, what happens
to the brightness of the bulb?
B. The bulb gets dimmer.
Slide 23-40