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Lecture 7.1
Announcement:
1.One home work with lowest score will be dropped at the
end of semester.
2.The second midterm in the next Thursday
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Lecture Notes on Electric Potential and Capacitors, Study notes of Physics
A portion of lecture notes covering topics on electric potential energy, electric potential, relation between potential and field, conductors in electrostatic equilibrium, sources of electric potential, capacitance, capacitors, energy stored in a capacitor, dielectrics, capacitor combinations, and equivalent capacitance. It includes multiple-choice questions related to electric potential differences, potential-energy graphs, and charged spheres.
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Pre 2010
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Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Lecture 7.
- Announcement: end of semester.One home work with lowest score will be dropped at the
The second midterm in the next Thursday
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Electric potential energy and electric potential
Relation between potential and field
Revisit Conductors in Electrostatic Equilibrium
Sources of Electric Potential: battery
Review: Potential and Field
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
A.
1.0 V
B.
2.0 V
C.
5.0 V
D.
6.0 V
E.
7.0 V
created by these three batteries? What total potential difference is
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
electric field?graph describes this Which potential-energy
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
A.
V
(^1)
(^) V (^2) = (^) V (^3) and (^) E (^1) > (^) E (^2) > (^) E 3
B.
V
(^1) > (^) V (^2) > (^) V (^3) and (^) E (^1) = (^) E (^2) = (^) E 3
C.
V
(^1)
(^) V (^2) = (^) V (^3) and (^) E (^1) = (^) E (^2) = (^) E 3
D.
V
(^1) > (^) V (^2) > (^) V (^3) and (^) E (^1) > (^) E (^2) > (^) E 3
E.
V
(^3) > (^) V (^2) > (^) V (^1) and (^) E (^1) = (^) E (^2) = (^) E 3
aresurface of each sphereand electric field at themetal wire. The potentialare connected by a thinspheres of different radii Three charged, metal
V
and
E
. Which of
the following is true?
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
A.
V
(^1) = (^) V (^2) = (^) V (^3) and
(^) E (^1) > (^) E (^2) > (^) E 3
B.
V
(^1) > (^) V (^2) > (^) V (^3) and (^) E (^1) = (^) E (^2) = (^) E 3
C.
V
(^1)
(^) V (^2) = (^) V (^3) and (^) E (^1) = (^) E (^2) = (^) E 3
D.
V
(^1) > (^) V (^2) > (^) V (^3) and (^) E (^1) > (^) E (^2) > (^) E 3
E.
V
(^3) > (^) V (^2) > (^) V (^1) and (^) E (^1) = (^) E (^2) = (^) E 3
aresurface of each sphereand electric field at themetal wire. The potentialare connected by a thinspheres of different radii Three charged, metal
V
and
E
. Which of
the following is true?
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley. Capacitor: two piece of oppositely
charged conductors
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Cylindrical and Spherical Capacitors
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Capacitor: what is it good for?
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Capacitance and Capacitors
The ratio of the charge
Q
to the potential difference
V
C
is
called the
capacitance
C
Capacitance is a purely
(^) geometric
(^) property of two electrodes
unit of capacitance is thebecause it depends only on their surface area and spacing. The SI
(^) farad
the potential difference between the plates. The charge on the capacitor plates is directly proportional to 1 farad = 1 F = 1 C/V. Result of principle of linear superposition
C
Q
V
C
Copyright © 2008 Pearson Education, Inc., publishing as Pearson Addison-Wesley.
Combinations of Capacitors