Ch25 Verified Test Bank Capacitance - Physics Extended 11e | Test Bank by Halliday by David Halliday. DOCX document preview.
Chapter: Chapter 25
Learning Objectives
LO 25.1.0 Solve problems related to capacitance.
LO 25.1.1 Sketch a schematic diagram of a circuit with a parallel-plate capacitor, a battery, and an open or closed switch.
LO 25.1.2 In a circuit with a battery, an open switch, and an uncharged capacitor, explain what happens to the conduction electrons when the switch is closed.
LO 25.1.3 For a capacitor, apply the relationship between the magnitude of charge q on either plate (“the charge on the capacitor”), the potential difference V between the plates (“the potential across the capacitor”), and the capacitance C of the capacitor.
LO 25.2.0 Solve problems related to calculating the capacitance.
LO 25.2.1 Explain how Gauss’ law is used to find the capacitance of a parallel-plate capacitor.
LO 25.2.2 For a parallel-plate capacitor, a cylindrical capacitor, a spherical capacitor, and an isolated sphere, calculate the capacitance.
LO 25.3.0 Solve problems related to capacitors in parallel and in series.
LO 25.3.1 Sketch schematic diagrams for a battery and (a) three capacitors in parallel and (b) three capacitors in series.
LO 25.3.2 Identify that capacitors in parallel have the same potential difference, which is the same value that their equivalent capacitor has.
LO 25.3.3 Calculate the equivalent capacitance of several capacitors in parallel.
LO 25.3.4 Identify that the total charge stored on parallel capacitors is the sum of the charges stored on the individual capacitors.
LO 25.3.5 Identify that capacitors in series have the same charge, which is the same value that their equivalent capacitor has.
LO 25.3.6 Calculate the equivalent capacitance of several capacitors in series.
LO 25.3.7 Identify that the potential applied to capacitors in series is equal to the sum of the
potentials across the individual capacitors.
LO 25.3.8 For a circuit with a battery and some capacitors in parallel and some in series, simplify the circuit in steps by finding equivalent capacitors, until the charge and potential on the final equivalent capacitor can be determined, and then reverse the steps to find the charge and potential on the individual capacitors.
LO 25.3.9 For a circuit with a battery, an open switch, and one or more uncharged capacitors, determine the amount of charge that moves through a point in the circuit when the switch is closed.
LO 25.3.10 When a charged capacitor is connected in parallel to one or more uncharged capacitors, determine the charge and potential difference on each capacitor when equilibrium is reached.
LO 25.4.0 Solve problems related to energy stored in an electric field.
LO 25.4.1 Explain how the work required to charge a capacitor results in the potential energy of the capacitor.
LO 25.4.2 For a capacitor, apply the relationship between the potential energy U, the capacitance C, and the potential difference V.
LO 25.4.3 For a capacitor, apply the relationship between the potential energy, the internal volume, and the internal energy density.
LO 25.4.4 For any electric field, apply the relationship between the potential energy density u in the field and the field’s magnitude E.
LO 25.4.5 Explain the danger of sparks in airborne dust.
LO 25.5.0 Solve problems related to capacitor with a dielectric.
LO 25.5.1 Identify that capacitance is increased if the space between the plates is filled with a dielectric material.
LO 25.5.2 For a capacitor, calculate the capacitance with and without a dielectric.
LO 25.5.3 For a region filled with a dielectric material with a given dielectric constant κ, identify that all electrostatic equations containing the permittivity constant ε0 are modified by multiplying that constant by the dielectric constant to get κε0.
LO 25.5.4 Name some of the common dielectrics.
LO 25.5.5 In adding a dielectric to a charged capacitor, distinguish the results for a capacitor (a)
connected to a battery and (b) not connected to a battery.
LO 25.5.6 Distinguish polar dielectrics from nonpolar dielectrics.
LO 25.5.7 In adding a dielectric to a charged capacitor, explain what happens to the electric field
between the plates in terms of what happens to the atoms in the dielectric.
LO 25.6.0 Solve problems related to dielectrics and Gauss' law.
LO 25.6.1 In a capacitor with a dielectric, distinguish free charge from induced charge.
LO 25.6.2 When a dielectric partially or fully fills the space in a capacitor, find the free charge, the induced charge, the electric field between the plates (if there is a gap, there is more than one field value), and the potential between the plates.
Multiple Choice
1. The units of capacitance are equivalent to:
A) J/C
B) V/C
C) J2/C
D) C/J
E) C2/J
Difficulty: E
Section: 25-1
Learning Objective 25.1.0
2. A farad is the same as a:
A) J/V
B) V/J
C) C/V
D) V/C
E) N/C
Difficulty: E
Section: 25-1
Learning Objective 25.1.0
3. A parallel-plate capacitor C has a charge Q. The actual charges on its plates are:
A) Q, Q
B) Q/2, Q/2
C) Q, –Q
D) Q/2, –Q/2
E) Q, 0
Difficulty: E
Section: 25-1
Learning Objective 25.1.0
4. Each plate of a capacitor stores a charge of magnitude 1 mC when a 100-V potential difference is applied. The capacitance is:
A) 5 F
B) 10 F
C) 50 F
D) 100 F
E) none of these
Difficulty: E
Section: 25-1
Learning Objective 25.1.3
5. To charge a 1-F capacitor with 2 C requires a potential difference of:
A) 0.2 V
B) 0.5 V
C) 2 V
D) 5 V
E) none of these
Difficulty: E
Section: 25-1
Learning Objective 25.1.3
6. If the charge on a parallel-plate capacitor is doubled:
A) the capacitance is halved
B) the capacitance is doubled
C) the electric field is halved
D) the electric field is doubled
E) the surface charge density is not changed on either plate
Difficulty: E
Section: 25-2
Learning Objective 25.2.0
7. The capacitance of a parallel-plate capacitor with plate area A and plate separation d is given by:
A) 0d/A
B) 0d/2A
C) 0A/d
D) 0A/2d
E) d/0
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
8. The capacitance of a parallel-plate capacitor is:
A) proportional to the plate area
B) proportional to the charge stored
C) independent of any material inserted between the plates
D) proportional to the potential difference of the plates
E) proportional to the plate separation
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
9. The plate areas and plate separations of five parallel plate capacitors are
capacitor 1: area A0, separation d0 | |
capacitor 2: area 2A0, separation 2d0 | |
capacitor 3: area 2A0, separation d0/2 | |
capacitor 4: area A0/2, separation 2d0 | |
capacitor 5: area A0, separation d0/2 |
Rank these according to their capacitances, least to greatest.
A) 1, 2, 3, 4, 5
B) 5, 4, 3, 2, 1
C) 5, then 3 and 4 tie, then 1, then 2
D) 4, then 1 and 2 tie, then 5, then 3
E) 3, then 5, then 1 and 2 tie, then 4
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
10. The capacitance of a parallel-plate capacitor can be increased by:
A) increasing the charge
B) decreasing the charge
C) increasing the plate separation
D) decreasing the plate separation
E) decreasing the plate area
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
11. If both the plate area and the plate separation of a parallel-plate capacitor are doubled, the capacitance is:
A) doubled
B) halved
C) unchanged
D) one-fourth the original
E) quadrupled
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
12. If the plate area of an isolated charged parallel-plate capacitor is doubled:
A) the electric field is doubled
B) the potential difference is halved
C) the charge on each plate is halved
D) the surface charge density on each plate is doubled
E) none of the above
Difficulty: M
Section: 25-2
Learning Objective 25.2.2
13. If the plate separation of an isolated charged parallel-plate capacitor is doubled:
A) the electric field is doubled
B) the potential difference is halved
C) the charge on each plate is halved
D) the surface charge density on each plate is doubled
E) none of the above
Difficulty: M
Section: 25-2
Learning Objective 25.2.2
14. Pulling the plates of an isolated charged capacitor apart:
A) increases the capacitance
B) increases the potential difference
C) does not affect the potential difference
D) decreases the potential difference
E) does not affect the capacitance
Difficulty: M
Section: 25-2
Learning Objective 25.2.2
15. A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm. To obtain an electric field of 2.0 106 V/m between the plates, the magnitude of the charge on each plate should be:
A) 3.5 10-6 C
B) 7.1 10-6 C
C) 1.4 10-5 C
D) 1.8 10-5 C
E) 8.9 10-5 C
Difficulty: M
Section: 25-2
Learning Objective 25.2.2
16. A parallel-plate capacitor has a plate area of 0.2 m2 and a plate separation of 0.1 mm. If the charge on each plate has a magnitude of 4 10–6 C the potential difference across the plates is approximately:
A) 0 V
B) 4 10–2 V
C) 2 102 V
D) 2 105 V
E) 4 108 V
Difficulty: M
Section: 25-2
Learning Objective 25.2.2
17. The capacitance of a spherical capacitor with inner radius a and outer radius b is proportional to:
A) a/b
B) b – a
C) b2 – a2
D) ab/(b – a)
E) ab/(b2 – a2)
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
18. The capacitance of a single isolated spherical conductor with radius R is proportional to:
A) R
B) R2
C) 1/R
D) 1/R2
E) none of these
Difficulty: E
Section: 25-2
Learning Objective 25.2.2
19. The capacitance of a cylindrical capacitor can be increased by:
A) decreasing both the radius of the inner cylinder and the length
B) increasing both the radius of the inner cylinder and the length
C) increasing the radius of the outer cylindrical shell and decreasing the length
D) decreasing the radius of the inner cylinder and increasing the radius of the outer cylindrical shell
E) only by decreasing the length
Difficulty: M
Section: 25-2
Learning Objective 25.2.2
20. Two conducting spheres have radii of R1 and R2 with R1 greater than R2. If they are far apart the capacitance is proportional to:
A) R1R2/(R1 – R2)
B)
C) (R1 – R2)/R1R2
D)
E) none of these
Difficulty: H
Section: 25-2
Learning Objective 25.2.2
21. A parallel-plate capacitor has a plate area of 0.3 m2 and a plate separation of 0.1 mm. If the charge on each plate has a magnitude of 5 10–6 C then the force exerted by one plate on the other has a magnitude of about:
A) 5 N
B) 9 N
C) 1 104 N
D) 9 105 N
E) 2 107 N
Difficulty: H
Section: 25-2
Learning Objective 25.2.2
22. Each of the four capacitors shown is 500 F. The voltmeter reads 1000V. The magnitude of the charge on each capacitor plate is:
A) 0.2 C
B) 0.5 C
C) 20 C
D) 50 C
E) none of these
Difficulty: M
Section: 25-3
Learning Objective 25.3.2
23. Two parallel-plate capacitors with the same plate area but different capacitance are connected in parallel to a battery. Both capacitors are filled with air. The quantity that is the same for both capacitors when they are fully charged is:
A) potential difference
B) energy density
C) electric field between the plates
D) charge on the positive plate
E) plate separation
Difficulty: E
Section: 25-3
Learning Objective 25.3.2
24. Two parallel-plate capacitors with different plate separation but the same capacitance are connected in series to a battery. Both capacitors are filled with air. The quantity that is NOT the same for both capacitors when they are fully charged is:
A) potential difference
B) stored energy
C) electric field between the plates
D) charge on the positive plate
E) dielectric constant
Difficulty: E
Section: 25-3
Learning Objective 25.3.2
25. Two parallel-plate capacitors with different capacitance but the same plate separation are connected in series to a battery. Both capacitors are filled with air. The quantity that is the same for both capacitors when they are fully charged is:
A) potential difference
B) stored energy
C) energy density
D) electric field between the plates
E) charge on the positive plate
Difficulty: E
Section: 25-3
Learning Objective 25.3.2
26. Capacitor C1 and C2 are connected in parallel. The equivalent capacitance is given by:
A) C1C2/(C1 + C2)
B) (C1 + C2)/C1C2
C) 1/(C1 + C2)
D) C1/C2
E) C1 + C2
Difficulty: E
Section: 25-3
Learning Objective 25.3.3
27. A battery is used to charge a parallel combination of two identical capacitors. If the potential difference across the battery terminals is V and the total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:
A) Q/2 and V/2, respectively
B) Q and V, respectively
C) Q/2 and V, respectively
D) Q and V/2, respectively
E) Q and 2V, respectively
Difficulty: E
Section: 25-3
Learning Objective 25.3.4
28. A 2-F and a 1-F capacitor are connected in series and a potential difference is applied across the combination. The 2-F capacitor has:
A) twice the charge of the 1-F capacitor
B) half the charge of the 1-F capacitor
C) twice the potential difference of the 1-F capacitor
D) half the potential difference of the 1-F capacitor
E) none of the above
Difficulty: M
Section: 25-3
Learning Objective 25.3.4
29. A 2-F and a 1-F capacitor are connected in parallel and a potential difference is applied across the combination. The 2-F capacitor has:
A) twice the charge of the 1-F capacitor
B) half the charge of the 1-F capacitor
C) twice the potential difference of the 1-F capacitor
D) half the potential difference of the 1-F capacitor
E) none of the above
Difficulty: M
Section: 25-3
Learning Objective 25.3.4
30. Capacitors C1 and C2 are connected in series and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as:
A) the charge on C1
B) the sum of the charges on C1 and C2
C) the difference of the charges on C1 and C2
D) the product of the charges on C1 and C2
E) none of the above
Difficulty: E
Section: 25-3
Learning Objective 25.3.5
31. Capacitors C1 and C2 are connected in series. The equivalent capacitance is given by:
A) C1C2/(C1 + C2)
B) (C1 + C2)/C1C2
C) 1/(C1 + C2)
D) C1/C2
E) C1 + C2
Difficulty: E
Section: 25-3
Learning Objective 25.3.6
32. Two identical capacitors are connected in series and two, each identical to the first, are connected in parallel. The equivalent capacitance of the series connection is ________ the equivalent capacitance of parallel connection.
A) twice
B) four times
C) half
D) one fourth
E) the same as
Difficulty: M
Section: 25-3
Learning Objective 25.3.6
33. A 2-F and a 1-F capacitor are connected in series and charged from a battery. They store charges P and Q, respectively. When disconnected and charged separately using the same battery, they have charges R and S, respectively. Then:
A) R > S > Q = P
B) P > Q > R = S
C) R > P = Q > S
D) R = P > S = Q
E) R > P > S = Q
Difficulty: M
Section: 25-3
Learning Objective 25.3.6
34. Capacitors C1 and C2 are connected in parallel and a potential difference is applied to the combination. If the capacitor that is equivalent to the combination has the same potential difference, then the charge on the equivalent capacitor is the same as:
A) the charge on C1
B) the sum of the charges on C1 and C2
C) the difference of the charges on C1 and C2
D) the product of the charges on C1 and C2
E) none of the above
Difficulty: E
Section: 25-3
Learning Objective 25.3.7
35. A battery is used to charge a series combination of two identical capacitors. If the potential difference across the battery terminals is V and total charge Q flows through the battery during the charging process then the charge on the positive plate of each capacitor and the potential difference across each capacitor are:
A) Q/2 and V/2, respectively
B) Q and V, respectively
C) Q/2 and V, respectively
D) Q and V/2, respectively
E) Q and 2V, respectively
Difficulty: E
Section: 25-3
Learning Objective 25.3.7
36. Two identical capacitors, each with capacitance C, are connected in parallel and the combination is connected in series to a third identical capacitor. The equivalent capacitance of this arrangement is:
A) 2C/3
B) C
C) 3C/2
D) 2C
E) 3C
Difficulty: M
Section: 25-3
Learning Objective 25.3.8
37. The diagram shows six 6-F capacitors. The capacitance between points a and b is:
A) 1 F
B) 3 F
C) 4 F
D) 6 F
E) 9 F
Difficulty: M
Section: 25-3
Learning Objective 25.3.8
38. Each of the three 25-F capacitors shown is initially uncharged. How many coulombs of charge pass through the ammeter A after the switch S is closed?
A) 0.033 C
B) 0.10 C
C) 0.30 C
D) 10 C
E) none of these
Difficulty: M
Section: 25-3
Learning Objective 25.3.9
39. Two parallel-plate capacitors with the same plate separation but different capacitance are connected in parallel to a battery. Both capacitors are filled with air. The quantity that is NOT the same for both capacitors when they are fully charged is:
A) potential difference
B) energy density
C) electric field between the plates
D) charge on the positive plate
E) dielectric constant
Difficulty: E
Section: 25-3
Learning Objective 25.3.9
40. Capacitor C1 is connected alone to a battery and charged until the magnitude of the charge on each plate is 4.0 108 C. Then it is removed from the battery and connected to two other capacitors C2 and C3, as shown. The charge on the positive plate of C1 is then 1.0 108 C. The charges on the positive plates of C2 and C3 are:
A) q2 = 3.0 10-8 C and q3 = 3.0 108 C
B) q2 = 2.0 108 C and q3 = 2.0 108 C
C) q2 = 5.0 108 C and q3 = 1.0 108 C
D) q2 = 3.0 108 C and q3 = 1.0 108 C
E) q2 = 1.0 108 C and q3 = 3.0 108 C
Difficulty: M
Section: 25-3
Learning Objective 25.3.10
41. Let Q denote charge, V denote potential difference and U denote stored energy. Of these quantities, capacitors in series must have the same:
A) Q only
B) V only
C) U only
D) Q and U only
E) V and U only
Difficulty: E
Section: 25-4
Learning Objective 25.4.2
42. Let Q denote charge, V denote potential difference and U denote stored energy. Of these quantities, capacitors in parallel must have the same:
A) Q only
B) V only
C) U only
D) Q and U only
E) V and U only
Difficulty: E
Section: 25-4
Learning Objective 25.4.2
43. A 20-µF capacitor is charged to 200 V. Its stored energy is:
A) 4000 J
B) 4 J
C) 0.4 J
D) 0.1 J
E) 0.004 J
Difficulty: M
Section: 25-4
Learning Objective 25.4.2
44. A charged capacitor stores 10 C at 40 V. Its stored energy is:
A) 400 J
B) 200 J
C) 4 J
D) 2.5 J
E) 1.25 J
Difficulty: M
Section: 25-4
Learning Objective 25.4.2
45. A 2-F and a 1-F capacitor are connected in series and charged by a battery. They store energies P and Q, respectively. When disconnected and charged separately using the same battery, they have energies R and S, respectively. Then:
A) R > P > S > Q
B) P > Q > R > S
C) R > P > Q > S
D) P > R > S > Q
E) R > S > Q > P
Difficulty: M
Section: 25-4
Learning Objective 25.4.2
46. Capacitors A and B are identical. Capacitor A is charged so it stores 4 J of energy and capacitor B is uncharged. The capacitors are then connected in parallel. The total stored energy in the capacitors is now:
A) 16 J
B) 8 J
C) 4 J
D) 2 J
E) 1 J
Difficulty: M
Section: 25-4
Learning Objective 25.4.2
47. To store a total of 0.040 J of energy in the two identical capacitors shown, each should have a capacitance of:
A) 0.50 F
B) 1.0 F
C) 1.5 F
D) 2.0 F
E) 4.0 F
Difficulty: M
Section: 25-4
Learning Objective 25.4.2
48. A certain capacitor has a capacitance of 5.0 F. After it is charged to 5 C and isolated, the plates are brought closer together so its capacitance becomes 10 F. The work done by the agent is about:
A) 0 J
B) 1.25 10–6 J
C) 1.25 10–6 J
D) 8.3 10–7 J
E) 8.3 10–7 J
Difficulty: M
Section: 25-4
Learning Objective 25.4.2
49. A battery is used to charge a parallel-plate capacitor, after which it is disconnected. Then the plates are pulled apart to twice their original separation. This process will double the:
A) capacitance
B) surface charge density on each plate
C) stored energy
D) electric field between the two places
E) charge on each plate
Difficulty: E
Section: 25-4
Learning Objective 25.4.2
50. A parallel-plate capacitor has a plate area of 0.30 m2 and a plate separation of 0.10 mm. If the charge on each plate has a magnitude of 5.0 10–6 C, what is the energy density in its electric field?
A) 0.16 J/m3
B) 3.5 J/m3
C) 7.8 J/m3
D) 16 J/m3
E) 24 J/m3
Difficulty: M
Section: 25-4
Learning Objective 25.4.3
51. The quantity (1/2)0E2 has the dimensions of:
A) energy/farad
B) energy/coulomb
C) energy
D) energy/volume
E) energy/volt
Difficulty: E
Section: 25-4
Learning Objective 25.4.4
52. There are approximately 10 explosions in the US every year due to agricultural grain (corn and soybean) dust. Why is corn dust so dangerous?
A) Corn contains a lot of oil and is therefore very flammable.
B) Grain elevators use a lot of flammable material while processing the corn.
C) Corn dust has a lot of surface area and can be ignited by even a very small spark, which can be created simply by a person walking around.
D) Due to the presence of lots of agricultural material, grain elevators are especially rich in oxygen.
E) Workers are not careful about where they throw their cigarette butts, and sometimes set the corn on fire.
Difficulty: E
Section: 25-4
Learning Objective 25.4.5
53. An air-filled parallel-plate capacitor has a capacitance of 1 pF. The plate separation is then doubled and a wax dielectric is inserted, completely filling the space between the plates. As a result, the capacitance becomes 2 pF. The dielectric constant of the wax is:
A) 0.25
B) 0.50
C) 2.0
D) 4.0
E) 8.0
Difficulty: M
Section: 25-5
Learning Objective 25.5.1
54. One of the materials listed below is to be placed between two identical metal sheets, with no air gap, to form a parallel-plate capacitor. Which produces the greatest capacitance?
A) material of thickness 0.1 mm and dielectric constant 2
B) material of thickness 0.2 mm and dielectric constant 3
C) material of thickness 0.3 mm and dielectric constant 2
D) material of thickness 0.4 mm and dielectric constant 8
E) material of thickness 0.5 mm and dielectric constant 11
Difficulty: M
Section: 25-5
Learning Objective 25.5.2
55. Which of the following is not a dielectric?
A) silicon
B) germanium
C) polystyrene
D) titanium
E) paper
Difficulty: E
Section: 25-5
Learning Objective 25.5.4
56. A dielectric slab is slowly inserted between the plates of a parallel plate capacitor while the capacitor is connected to a battery. As it is being inserted:
A) the capacitance, the potential difference between the plates, and the charge on the positive plate all increase
B) the capacitance, the potential difference between the plates, the charge on the positive plate all decrease
C) the potential difference between the plates increases, the charge on the positive plate decreases, and the capacitance remains the same
D) the capacitance and the charge on the positive plate decrease but the potential difference between the plates remains the same
E) the capacitance and the charge on the plate increase but the potential difference between the plates remains the same
Difficulty: E
Section: 25-5
Learning Objective 25.5.5
57. A parallel-plate capacitor, with air dielectric, is charged by a battery, after which the battery is disconnected. A slab of glass dielectric is then slowly inserted between the plates. As it is being inserted:
A) a force repels the glass out of the capacitor
B) a force attracts the glass into the capacitor
C) no force acts on the glass
D) a net charge appears on the glass
E) the glass makes the plates repel each other
Difficulty: E
Section: 25-5
Learning Objective 25.5.5
58. What is the difference between a polar dielectric and a nonpolar dielectric?
A) A polar dielectric has a permanent electric field.
B) A nonpolar dielectric never has an internal electric field.
C) The molecules of a polar dielectric have a permanent electric dipole moment.
D) A nonpolar dielectric can have an induced electric field in any direction.
E) A polar dielectric is always aligned with the Earth’s electric field.
Difficulty: E
Section: 25-5
Learning Objective 25.5.6
59. What happens to the atoms in a dielectric when it is placed between the plates of a charged capacitor?
A) They begin to conduct electricity.
B) They create an induced electric field that is in the opposite direction of the field due to the charges on the plates.
C) They create an induced electric field that is in the same direction as the field due to the charges on the plates.
D) They completely cancel the electric field due to the charges on the plates.
E) They rotate so their positive ends are towards the positively charged plate.
Difficulty: E
Section: 25-5
Learning Objective 25.5.7
60. An air-filled capacitor is charged, and then a dielectric is inserted. As a result, there is an induced charge on the dielectric. What is the difference between induced charge and free charge?
A) There is no difference.
B) Induced charge does not result in a net charge on the dielectric.
C) Induced charge is smaller than free charge.
D) Free charge creates an electric field, but induced charge does not.
E) Free charge creates an electric potential, but induced charge does not.
Difficulty: E
Section: 25-6
Learning Objective 25.6.1
61. Two capacitors are identical except that one is filled with air and the other with oil. Both capacitors carry the same charge. The ratio of the electric fields Eair/Eoil is:
A) between 0 and 1
B) 0
C) 1
D) between 1 and infinity
E) infinite
Difficulty: M
Section: 25-6
Learning Objective 25.6.2