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
Voltage Gradients & Electric Fields
Objects always accele
MasteringPhysics
http:/session.masteringphysics.com/cgi-bin/CT.pl?teacherProblemVi.
Options: show answer statistics report wrong answers submit Note: selecting options may require report generation times of several minutes for large classes
Proble
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 of a 3 V battery with a
rectangular loop. The negative
Potential
PHYS 40C Discussion Questions
Week 3
SOLUTIONS
28.1 Eiectric Potential EnergY
28.2 The Potential Energy of Point
Charges
Fl
t-l
charge and a negative point charge are inside a parallei-plate l_l
capacitor. The point charges interact only with th
Induction
PHYS 40C Discussion Questions
Week 8
SOLUTIONS
33.1 lnduced Currents
33.2 Motional emf
Question 1
L
The figures below show one or more metal wires sliding on fixed metal rails in a magnetic field. For
each, determine if the induced current flows
1-a
8. This circuit has two resistors, with
R, > R2. which of the two resistors
dissipates the larger amollnt of power? Explain.
(,
i
)
Question 1
PHYS 40C Discussion Questions
dissipocfw_es Mora. povre,r.Week 6
TeR
Pn =
k,i:
"^*.ncfw_ cfw_lo.^,s
\'ro,$
c
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. Suppose you bring a positively charged rod close to the
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 leaves.
a. Suppose you bring a positively charged rod clo
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
Te=
i = ;, +n';': PHYS
i, iir,rl
Week 5
c,=ra
I,=(h)(TI
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 function of x. On the axes below the graph, draw the
grap
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) resistor.
Question 1
a. What is the instantaneous
resistor v
Midterm Thursday Nov 1
o One
O
page notes
t allowed
ll
d
Allowed to write on both sides
Must be in own handwriting. No xerox or tape.
o Old midterm available on web site.
o Will include ~1/4-1/3 multiple choice.
o Bring Student ID, pen/pencil, calculator,
June 6, 2005
Physics 40C Final Examination
Name
_
Student ID # _
Signature
_
This is a closed book exam, except that you may consult your one sheet of
notes (8.5x11) if you have prepared it. You may use a calculator, and you
will have three hours to work
November 1, 2012
Physics 40C Midterm Examination
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 use a calculator, and
you will have an hour and twenty minutes to work the 10 qu
April 28, 2005
Physics 40C Midterm Examination
Name
_
Student ID #: _
Signature
_
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 use a calculator, and
you will have an hour and
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 smaller insulating sphere with
radius a, with 10 mC of c
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 in the sketch at the right.
3) Determine the electrostat
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
c.111isshellisalsocmteredon '
QM=+2uC
the origin, and c
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
Magnetic
of
the
Source
32.3 The
page.
to the
Draw magnetic
ab