Chapter 30
Calculating E from V
Capacitors
Calculating capacitance
Capacitors in Series and
Parallel
Energy stored by capacitors
Dielectrics
Kenneth N. Barish Physics 40C
Chapter 30 Page 1
Voltage
Vol
Electric Charges and Forces
.
cHAPTER
25 25-5
PHYS 40C Discussion Questions
Week1
25.2 Gharge
25.3 lnsulators and Conductors
Question 1 10. A positively charged
electroscope has separated leaves.
a. S
Electric Charges and Forces
.
cHAPTER
PHYS 40C Discussion Questions
Week1
25.2 Gharge
25 25-5
SOLUTIONS
25.3 lnsulators and Conductors
Question 1 10. A positively charged
electroscope has separated le
16. Wire 1 and wire
2
are made from the same metal. Wire
I
has twice the diameter and half the electric
field of wire 2. What is the ratio I1lI2?
40C Discussion
Questions
E,= ?
Ers (nr*r)., SOLUTIONS
Physics 40C (Spring 2014): Final Exam
June 7th 2014: 8:30-11:00 AM
Exam A
This is a closed book exam, except that you may consult your single sheet of notes (8.5x11) if you
have prepared one. You may
Physics 40C (Spring 2015): Midterm Exam
March 5th 2015: 9:40-11:00 AM
Exam A
This is a closed book exam, except that you may consult your single sheet of notes (8.5x11) if you
have prepared one. You m
1. In the Coulombs Law Lab, the uncorrected angle increases linearly with 1/R^2.
2. For the inductor circuit in the Time Dependent Electrical Circuits lab, the steady state
voltage drop across the ind
PHYSICS . Name
PRACTECE EXAM #1 Show ALL yew week
Answer quesiioos 1&22 on separate pages.
lUE/FALSE- Write rTl if lite. statement is true and 'F' if the statemeni is false.
1) If two point charges ex
Ir=
]"0
A of a series RLC circuit is 1000 Hz. What is the resonance frequency if:
17. The resonance frequency
.
35 R
AC
cHAPTER
35-O
a. The
resistance
is Circuits
doubled?
PHYS 40C Discussion Question
of the two conductors dissipates the Iarger amount of power? Explain.
glL
l.
,
qnd R, >Rl.
13. The figure shows two circuits. The two ideal batteries
31
l\JL
.lon Sir'r.q.
4f
f , -'eq
P =e *[-,e.* A,.
Review Exam Questions (sketched out)
1. There is a hollow metal sphere, with thickness d and inner radius b and outer radius R. The
metal sphere is electrically neutral. Inside the metal sphere is a s
Problem 1 (25 points not more than 20 minutes) Three positive charges,
each equal to +q , are situated at the corners of an equilateral triangle. Each
side of the triangle is of length 2d . as shown i
Problem 1 (25 points) A metal
sphereofradiusa iscentetedon
leogin,andcarriesatotal =15!
charge QM. Surrounding this 52 = 3.0 m
spheleisasphecalmetalshell c=4.5m
of innermdiusbandouterradius Qqahm=-MC
32-4
cHAprER
32
.
PHYS 40C Discussion Questions
Week 7
SOLUTIONS
The Magnetic Field
The wire is perpendicular
The wire is in the plane of the page. Show the magnetic field
Field: Moving Charqes
Magnet
H-
R
c. The frequencyaris doubled?
loov
PHYS
40CJ"g"^l"t
Discussion
is nocfw_
fro1,"rr.y.
onQuestions
IR
Week 9
r.0 A
SOLUTIONS
Circuits
Capacitor
35.2
phasor is shown
3. The current
for a l0 f) resis
29-2
cHAprER
PHYS 40C Discussion Questions
Week 4
29 . Potential and Field
SOLUTIONS
29.3 Finding the Electric Field from the Potential
Question 1 3. The top graph shows the electric potential
as a fu
PHYS 40C Discussion Questions
Week 10
SOLUTIONS
Post-Midterm Review
Current and Resistance
'
cHAPTER
30 30-7
30.5 Resistance and Ohm's Law
Question 1
20. A continuous metal wire connects the two ends