Electric Potential Chapter.24 Test Bank Answers - Physics Extended 11e | Test Bank by Halliday by David Halliday. DOCX document preview.
Chapter: Chapter 24
Learning Objectives
LO 24.1.0 Solve problems related to electric potential.
LO 24.1.1 Identify that the electric force is conservative and thus has an associated potential energy.
LO 24.1.2 Identify that at every point in a charged object’s electric field, the object sets up an electric potential V, which is a scalar quantity that can be positive or negative depending on the sign of object’s charge.
LO 24.1.3 For a charged particle placed at a point in an object’s electric field, apply the relationship between the object’s electric potential V at that point, the particle’s charge q, and the potential energy U of the particle-object system.
LO 24.1.4 Convert energies between units of joules and electron-volts.
LO 24.1.5 If a charged particle moves from an initial point to a final point in an electric field, apply
the relationships between the change ΔV in the potential, the particle’s charge q, the change
ΔU in the potential energy, and the work W done by the electric force.
LO 24.1.6 If a charged particle moves between two given points in the electric field of a charged
object, identify that the amount of work done by the electric force is path independent.
LO 24.1.7 If a charged particle moves through a change ΔV in electric potential without an applied
force acting on it, relate ΔV and the change ΔK in the particle’s kinetic energy.
LO 24.1.8 If a charged particle moves through a change ΔV in electric potential while an applied
force acts on it, relate ΔV, the change ΔK in the particle’s kinetic energy, and the work Wapp
done by the applied force.
LO 24.2.0 Solve problems related to equipotential surfaces and the electric field.
LO 24.2.1 Identify an equipotential surface and describe how it is related to the direction of the
associated electric field.
LO 24.2.2 Given an electric field as a function of position, calculate the change in potential ΔV from an initial point to a final point by choosing a path between the points and integrating the
dot product of the field and a length element along the path.
LO 24.2.3 For a uniform electric field, relate the field magnitude E and the separation Δx and
potential difference ΔV between adjacent equipotential lines.
LO 24.2.4 Given a graph of electric field E versus position along an axis, calculate the change in
potential ΔV from an initial point to a final point by graphical integration.
LO 24.2.5 Explain the use of a zero-potential location.
LO 24.3.0 Solve problems related to potential due to a charged particle.
LO 24.3.1 For a given point in the electric field of a charged particle, apply the relationship between the electric potential V, the charge of the particle q, and the distance r from the particle.
LO 24.3.2 Identify the correlation between the algebraic signs of the potential set up by a particle
and the charge of the particle.
LO 24.3.3 For points outside or on the surface of a spherically symmetric charge distribution,
calculate the electric potential as if all the charge is concentrated as a particle at the center of the sphere.
LO 24.3.4 Calculate the net potential at any given point due to several charged particles, identifying that algebraic addition is used, not vector addition.
LO 24.3.5 Draw equipotential lines for a charged particle.
LO 24.4.0 Solve problems related to potential due to an electric dipole.
LO 24.4.1 Calculate the potential V at any given point due to an electric dipole, in terms of the
magnitude p of the dipole moment or the product of the charge separation d and the magnitude q of either charge.
LO 24.4.2 For an electric dipole, identify the locations of positive potential, negative potential, and zero potential.
LO 24.4.3 Compare the decrease in potential with increasing distance for a single charged particle and an electric dipole.
LO 24.5.0 Solve problems related to potential due to a continuous charge distribution.
LO 24.5.1 For charge that is distributed uniformly along a line or over a surface, find the net potential at a given point by splitting the distribution up into charge elements and summing the potential (by integration) due to each one.
LO 24.6.0 Solve problems related to calculating the field from the potential.
LO 24.6.1 Given an electric potential as a function of position along an axis, find the electric field along that axis.
LO 24.6.2 Given a graph of electric potential versus position along an axis, determine the electric field along the axis.
LO 24.6.3 For a uniform electric field, relate the field magnitude E and the separation Δx and potential difference ΔV between adjacent equipotential lines.
LO 24.6.4 Relate the direction of the electric field and the directions in which the potential decreases and increases.
LO 24.7.0 Solve problems related to electric potential energy of a system of charged particles.
LO 24.7.1 Identify that the total potential energy of a system of charged particles is equal to the work an applied force must do to assemble the system, starting with the particles infinitely far apart.
LO 24.7.2 Calculate the potential energy of a pair of charged particles.
LO 24.7.3 Identify that if a system has more than two charged particles, then the system’s total potential energy is equal to the sum of the potential energies of every pair of the particles.
LO 24.7.4 Apply the principle of the conservation of mechanical energy to a system of charged particles.
LO 24.7.5 Calculate the escape speed of a charged particle from a system of charged particles (the minimum initial speed required to move infinitely far from the system).
LO 24.8.0 Solve problems related to potential of a charged isolated conductor.
LO 24.8.1 Identify that an excess charge placed on an isolated conductor (or connected isolated conductors) will distribute itself on the surface of the conductor so that all points of the conductor come to the same potential.
LO 24.8.2 For an isolated spherical conducting shell, sketch graphs of the potential and the electric field magnitude versus distance from the center, both inside and outside the shell.
LO 24.8.3 For an isolated spherical conducting shell, identify that internally the electric field is zero and the electric potential has the same value as the surface and that externally the electric field and the electric potential have values as though all of the shell’s charge is concentrated as a particle at its center.
LO 24.8.4 For an isolated cylindrical conducting shell, identify that internally the electric field is zero and the electric potential has the same value as the surface and that externally the electric field and the electric potential have values as though all of the cylinder’s charge is concentrated as a line of charge on the central axis.
Multiple Choice
1. An electron volt is:
A) the force acting on an electron in a field of 1 N/C
B) the force required to move an electron 1 meter
C) the energy gained by an electron in moving through a potential difference of 1 volt
D) the energy needed to move an electron through 1 meter in any electric field
E) the work done when 1 coulomb of charge is moved through a potential difference of 1 volt
Difficulty: E
Section: 24-1
Learning Objective 24.1.0
2. An electron has charge –e and mass me. A proton has charge e and mass 1840me. A "proton volt" is equal to:
A) 1eV
B) 1840eV
C) (1/1840)eV
D) eV
E) (1/) eV
Difficulty: E
Section: 24-1
Learning Objective 24.1.0
3. The fact that we can define electric potential energy means that:
A) the electric force is nonconservative
B) the electric force is conservative
C) the work done on a charged particle depends on the path it takes
D) there is a point where the electric potential energy is exactly zero
E) it takes work for the electric force to move from some point a to some other point b and back again
Difficulty: E
Section: 24-1
Learning Objective 24.1.1
4. An electrically charged object creates an electric field. The electric potential due to this object:
A) is a vector that points either towards or away from the object, depending on the sign of the charge
B) is a vector that makes circular paths around the object
C) is a non-negative scalar
D) is a scalar but will be positive or negative depending on the sign of the charge
E) points in the same direction as the field
Difficulty: E
Section: 24-1
Learning Objective 24.1.2
5. A tiny sphere carrying a charge of 6.5 µC sits in an electric field, at a point where the electric potential is 240 V. What is the sphere’s potential energy?
A) 2.7 x 10-8 J
B) 6.5 x 10-6 J
C) 1.6 x 10-3 J
D) 240 J
E) 3.7 x 107 J
Difficulty: E
Section: 24-1
Learning Objective 24.1.3
6. Protons in the LHC accelerator in Geneva, Switzerland are accelerated to an energy of 4.0 TeV. What is this in joules?
A) 6.4 x 10-19 J
B) 6.4 x 10-16 J
C) 6.4 x 10-13 J
D) 6.4 x 10-10 J
E) 6.4 x 10-7 J
Difficulty: E
Section: 24-1
Learning Objective 24.1.4
7. An electron moves from point i to point f, in the direction of a uniform electric field. During this motion:
A) the work done by the field is positive and the potential energy of the electron-field system increases
B) the work done by the field is negative and the potential energy of the electron-field system increases
C) the work done by the field is positive and the potential energy of the electron-field system decreases
D) the work done by the field is negative and the potential energy of the electron-field system decreases
E) the work done by the field is positive and the potential energy of the electron-field system does not change
Difficulty: E
Section: 24-1
Learning Objective 24.1.5
8. If 500 J of work are required to carry a 40-C charge from one point to another, the potential difference between these two points is:
A) 12.5 V
B) 20,000 V
C) 0.08 V
D) depends on the path
E) none of these
Difficulty: M
Section: 24-1
Learning Objective 24.1.5
9. The potential difference between two points is 100 V. If a particle with a charge of 2 C is transported from one of these points to the other, the magnitude of the work done is:
A) 200 J
B) 100 J
C) 50 J
D) 100 V
E) 2 J
Difficulty: E
Section: 24-1
Learning Objective 24.1.5
10. During a lightning discharge, 30 C of charge move through a potential difference of 1.0 108 V in 2.0 10–2 s. The energy released by this lightning bolt is:
A) 1.5 1011 J
B) 3.0 109 J
C) 6.0 107 J
D) 3.3 106 J
E) 1500 J
Difficulty: E
Section: 24-1
Learning Objective 24.1.5
11. The work required to carry a particle with a charge of 6.0-µC from a 5.0-V equipotential surface to a 6.0-V equipotential surface and back again to the 5.0-V surface is:
A) 0 J
B) 1.2 10–5 J
C) 3.0 10–5 J
D) 6.0 10–5 J
E) 6.0 10–6 J
Difficulty: E
Section: 24-1
Learning Objective 24.1.5
12. An electron goes from one equipotential surface to another along one of the four paths shown below. Rank the paths according to the work done by the electric field, from least to greatest.
A) 1, 2, 3, 4
B) 4, 3, 2, 1
C) 1, then 3, then 4 and 2 tie
D) 4 and 2 tie, then 3, then 1
E) 4, 3, 1, 2
Difficulty: E
Section: 24-1
Learning Objective 24.1.6
13. A particle with mass m and charge –q is projected with speed v0 into the region between two parallel plates as shown. The potential difference between the two plates is V and their separation is d. The change in kinetic energy of the particle as it traverses this region is:
A) –qV/d
B)
C) qV
D)
E) none of these
Difficulty: E
Section: 24-1
Learning Objective 24.1.7
14. An electron is accelerated from rest through a potential difference V. Its final speed is proportional to:
A) V
B) V2
C)
D) 1/V
E) 1/
Difficulty: E
Section: 24-1
Learning Objective 24.1.7
15. Two large parallel conducting plates are separated by a distance d, placed in a vacuum, and connected to a source of potential difference V. An oxygen ion, with charge 2e, starts from rest on the surface of one plate and accelerates to the other. If e denotes the magnitude of the electron charge, the final kinetic energy of this ion is:
A) eV/2
B) eV/d
C) eVd
D) Vd/e
E) 2eV
Difficulty: E
Section: 24-1
Learning Objective 24.1.7
16. The Earth’s electric field creates a potential that increases 100 V for every meter of altitude. If an object of charge +4.5 mC and mass 68 g falls a distance of 1.0 m from rest under the influence of the Earth’s electric and gravitational fields, what is its final kinetic energy?
A) 0.22 J
B) 0.45 J
C) 0.67 J
D) 1.1 J
E) 7.2 J
Difficulty: M
Section: 24-1
Learning Objective 24.1.8
17. The electric field in a region around the origin is given by , where C is a constant. The equipotential surfaces are:
A) concentric cylinders with axes along the z axis
B) concentric cylinders with axes along the x axis
C) concentric spheres centered at the origin
D) planes parallel to the xy plane
E) planes parallel to the yz plane
Difficulty: M
Section: 24-2
Learning Objective 24.2.1
18. If the electric field is in the positive x direction and has a magnitude given by E = Cx2, where C is a constant, then the electric potential is given by V =
A) 2Cx
B) –2Cx
C) Cx3/3
D) –Cx3/3
E) –3Cx3
Difficulty: M
Section: 24-2
Learning Objective 24.2.2
19. The diagram shows four pairs of large parallel conducting plates. The value of the electric potential is given for each plate. Rank the pairs according to the magnitude of the electric field between the plates, least to greatest.
A) 1, 2, 3, 4
B) 4, 3, 2, 1
C) 2, 3, 1, 4
D) 2, 4, 1, 3
E) 3, 2, 4, 1
Difficulty: E
Section: 24-2
Learning Objective 24.2.3
20. The potential difference between the ends of a 2-meter stick that is parallel to a uniform electric field is 400 V. The magnitude of the electric field is:
A) 0 V/m
B) 100 V/m
C) 200 V/m
D) 400 V/m
E) 800 V/m
Difficulty: E
Section: 24-2
Learning Objective 24.2.3
21. The graph shows the electric field as a function of position in a particular region of space. If Exs = 100 N/C, what is the potential difference between x = 3 m and x = 6 m?
A) 250 V
B) 50 V
C) 0 V
D) –50 V
E) –250 V
Difficulty: M
Section: 24-2
Learning Objective 24.2.4
22. In separate experiments, four different particles each start from far away with the same speed and impinge directly on a gold nucleus. The masses and charges of the particles are
particle 1: mass m0, charge q0 | |
particle 2: mass 2m0, charge 2q0 | |
particle 3: mass 2m0, charge q0/2 | |
particle 4: mass m0/2, charge 2q0 |
Rank the particles according to the distance of closest approach to the gold nucleus, from smallest to largest.
A) 1, 2, 3, 4
B) 4, 3, 2, 1
C) 3, then 1 and 2 tie, then 4
D) 4, then 1 and 2 tie, then 3
E) 1 and 2 tie, then 3, then 4
Difficulty: M
Section: 24-3
Learning Objective 24.3.1
23. Positive charge is distributed uniformly throughout a non-conducting sphere. The highest electric potential occurs:
A) at the center
B) at the surface
C) halfway between the center and surface
D) just outside the surface
E) far from the sphere
Difficulty: M
Section: 24-3
Learning Objective 24.3.3
24. A total charge of 7 10–8 C is uniformly distributed throughout a non-conducting sphere with a radius of 5 cm. The electric potential at the surface, relative to the potential far away, is about:
A) –1.3 104 V
B) 1.3 104 V
C) 630 V
D) 130 V
E) 0 V
Difficulty: M
Section: 24-3
Learning Objective 24.3.3
25. Eight identical spherical raindrops are each at a potential V, relative to the potential far away. They coalesce to make one spherical raindrop whose potential is:
A) V/8
B) V/2
C) 2V
D) 4V
E) 8V
Difficulty: M
Section: 24-3
Learning Objective 24.3.4
26. Two particles with charges Q and Q are fixed at the vertices of an equilateral triangle with sides of length a. If k = 1/40, the work required to move a particle with a charge q from the other vertex to the center of the line joining the fixed charges is:
A) 0
B) kQq/a
C) kQq/a2
D) 2kQq/a
E)
Difficulty: M
Section: 24-3
Learning Objective 24.3.4
27. The equipotential surfaces associated with a charged point particle are:
A) radially outward from the particle
B) vertical planes
C) horizontal planes
D) concentric spheres centered at the particle
E) concentric cylinders with the particle on the axis
Difficulty: E
Section: 24-3
Learning Objective 24.3.5
28. A particle with charge q is to be brought from far away to a point near an electric dipole. No work is done if the final position of the particle is on:
A) the line through the charges of the dipole
B) a line that is perpendicular to the dipole moment
C) a line that makes an angle of 45 with the dipole moment
D) a line that makes an angle of 30 with the dipole moment
E) none of the above
Difficulty: E
Section: 24-4
Learning Objective 24.4.1
29. Equipotential surfaces associated with an electric dipole are:
A) spheres centered on the dipole
B) cylinders with axes along the dipole moment
C) planes perpendicular to the dipole moment
D) planes parallel to the dipole moment
E) none of the above
Difficulty: E
Section: 24-4
Learning Objective 24.4.1
30. In the diagram, the points 1, 2, and 3 are all the same very large distance from a dipole. Rank the points according to the values of the electric potential at them, from the most negative to the most positive.
A) 1, 2, 3
B) 3, 2, 1
C) 2, 3, 1
D) 1, 3, 2
E) 1 and 2 tie, then 3
Difficulty: M
Section: 24-4
Learning Objective 24.4.2
31. Compared to the magnitude of the electric potential far from a point charge, the magnitude of the electric potential far from an electric dipole:
A) decreases more slowly with distance
B) decreases more quickly with distance
C) increases more slowly with distance
D) increases more quickly with distance
E) varies in the same way with distance
Difficulty: E
Section: 24-4
Learning Objective 24.4.3
32. A wire carrying a charge density of λ C/m is bent into a circle of radius r. What is the electric potential at the center of the circle?
A) λ/4πε0r
B) λ/4πε0
C) λ/4ε0
D) λ/2ε0
E) λ/ε0
Difficulty: M
Section: 24-5
Learning Objective 24.5.1
33. The electric potential in a certain region of space is given by V = –7.5x2 + 3x, where V is in volts and x is in meters. In this region the equipotential surfaces are:
A) planes parallel to the x axis
B) planes parallel to the yz plane
C) concentric spheres centered at the origin
D) concentric cylinders with the x axis as the cylinder axis
E) unknown unless the charge is given
Difficulty: M
Section: 24-6
Learning Objective 24.6.0
34. The electric potential at a certain point is given by V = –7.5x2 + 3x, where V is in volts and x is in meters. What is the electric field at that point?
A) = (15x – 3)
B) = (–15x + 3)
C) = (–2.5x3 + 1.5 x2)
D) = (2.5x3 – 1.5 x2)
E) = 0
Difficulty: E
Section: 24-6
Learning Objective 24.6.1
35. The graph shows the electric potential as a function of x in a certain region. What is the x component of the electric field in this region if Vs = 50 V?
A) 250 V/m
B) 40 V/m
C) 10 V/m
D) –40 V/m
E) –250 V/m
Difficulty: E
Section: 24-6
Learning Objective 24.6.2
36. A geologist measures the Earth’s electric field near the surface, and finds that equipotential lines 100 V apart are at a distance of 75 cm from each other. Assuming the electric field is uniform, what is its magnitude?
A) 130 V/m
B) 100 V/m
C) 75 V/m
D) 1.3 V/m
E) 0.75 V/m
Difficulty: E
Section: 24-6
Learning Objective 24.6.3
37. In a certain region of space the electric potential increases uniformly from east to west and does not vary in any other direction. The electric field:
A) points east and varies with position
B) points east and does not vary with position
C) points west and varies with position
D) points west and does not vary with position
E) points north and does not vary with position
Difficulty: E
Section: 24-6
Learning Objective 24.6.4
38. Choose the correct statement:
A) A proton tends to go from a region of low potential to a region of high potential
B) The potential of a negatively charged conductor must be negative
C) If = 0 at a point P then V must be zero at P
D) If V = 0 at a point P then must be zero at P
E) None of the above is correct
Difficulty: E
Section: 24-6
Learning Objective 24.6.4
39. A particle with a charge of 5.5 10–6 C is 3.5 cm from a particle with a charge of –2.3 10–8 C. The potential energy of this two-particle system, relative to the potential energy at infinite separation, is:
A) 3.3 10–2 J
B) –3.3 10–2 J
C) 9.3 10–1 J
D) –9.3 10–1 J
E) 0 J
Difficulty: M
Section: 24-7
Learning Objective 24.7.2
40. A particle with a charge of 5.5 10–8C is fixed at the origin. A particle with a charge of –2.3 10–8C is moved from x = 3.5 cm on the x axis to y = 4.3 cm on the y axis. The change in potential energy of the two-particle system is:
A) 3.1 10–3 J
B) –3.1 10–3 J
C) 6.0 10–5 J
D) –6.0 10–5 J
E) 0 J
Difficulty: M
Section: 24-7
Learning Objective 24.7.2
41. A particle with a charge of 5.5 10–8C charge is fixed at the origin. A particle with a charge of–2.3 10–8C charge is moved from x = 3.5 cm on the x axis to y = 3.5 cm on the y axis. The change in the potential energy of the two-charge system is:
A) 3.2 10–4 J
B) –3.2 10–4 J
C) 9.3 10–3 J
D) –9.3 10–3 J
E) 0 J
Difficulty: M
Section: 24-7
Learning Objective 24.7.2
42. Three particles lie on the x axis: particle 1, with a charge of 1 10–8 C is at x = 1 cm, particle 2, with a charge of 2 10–8 C, is at x = 2 cm, and particle 3, with a charge of 3 10–8 C, is at x = 3 cm. The potential energy of this arrangement, relative to the potential energy for infinite separation, is:
A) +4.9 10–4 J
B) 4.9 10–4 J
C) +8.5 10–4 J
D) 8.5 10–4 J
E) 0 J
Difficulty: M
Section: 24-7
Learning Objective 24.7.3
43. Two identical particles, each with charge q, are placed on the x axis, one at the origin and the other at x = 5 cm. A third particle, with charge –q, is placed on the x axis so the potential energy of the three-particle system is the same as the potential energy when they are all infinitely far apart. Its x coordinate is:
A) 13 cm
B) 2.5 cm
C) 7.5 cm
D) 10 cm
E) –5 cm
Difficulty: M
Section: 24-7
Learning Objective 24.7.3
44. Three possible configurations for an electron e and a proton p are shown below. Take the zero of potential to be at infinity and rank the three configurations according to the potential at S, from most negative to most positive.
A) 1, 2, 3
B) 3, 2, 1
C) 2, 3, 1
D) 1 and 2 tie, then 3
E) 1 and 3 tie, then 2
Difficulty: M
Section: 24-7
Learning Objective 24.7.3
45. Points R and T are each a distance d from each of two particles with charges of equal magnitudes and opposite signs as shown. If k = 1/40, the work required to move a particle with negative charge q from R to T is:
A) 0
B) kqQ/d2
C) kqQ/d
D)
E) kQq/(2d)
Difficulty: M
Section: 24-7
Learning Objective 24.7.3
46. Points R and T are each a distance d from each of two equal positive charges as shown. If k = 1/40, the work required to move a particle with a charge q from R to T is:
A) 0
B) kQq/d2
C) kQq/d
D)
E) kQq/(2d)
Difficulty: M
Section: 24-7
Learning Objective 24.7.3
47. An electric dipole consists of two equal and opposite charged particles of mass 1.2 g and charge 3.7 µC separated by 1.7 mm. What is the escape speed of the positive charge – that is, how much speed would you have to give it so it would escape the other charge?
A) 200 m/s
B) 350 m/s
C) 6600 m/s
D) 7.1 x 104 m/s
E) 2.0 x 105 m/s
Difficulty: M
Section: 24-7
Learning Objective 24.7.5
48. Two conducting spheres, one having twice the diameter of the other, are separated by a distance large compared to their diameters. The smaller sphere (1) has charge q and the larger sphere (2) is uncharged. If the spheres are connected by a long thin wire and come to equilibrium:
A) 1 and 2 have the same potential
B) 2 has twice the potential of 1
C) 2 has half the potential of 1
D) 1 and 2 have the same charge
E) all of the charge is dissipated
Difficulty: E
Section: 24-8
Learning Objective 24.8.1
49. A conducting sphere with radius R is charged until the magnitude of the electric field just outside its surface is E. The electric potential of the sphere, relative to the potential for away, is:
A) 0
B) E/R
C) E/R2
D) ER
E) ER2
Difficulty: E
Section: 24-8
Learning Objective 24.8.3
50. A 5-cm radius conducting sphere has a charge density of 2 10–6 C/m2 on its surface. Its electric potential, relative to the potential far away, is:
A) 1.1 104 V
B) 2.2 104 V
C) 2.3 105 V
D) 3.6 105 V
E) 7.2 106 V
Difficulty: M
Section: 24-8
Learning Objective 24.8.3
51. A hollow metal sphere is charged to a potential V. The potential at its center is:
A) V
B) 0
C) –V
D) 2V
E) V
Difficulty: E
Section: 24-8
Learning Objective 24.8.3
52. Two conducting spheres are far apart. The smaller sphere carries a total charge of Q. The larger sphere has a radius that is twice that of the smaller and is neutral. After the two spheres are connected by a conducting wire, the charges on the smaller and larger spheres, respectively, are:
A) Q/2 and Q/2
B) Q/3 and 2Q/3
C) 2Q/3 and Q/3
D) 0 and Q
E) 2Q and –Q
Difficulty: M
Section: 24-8
Learning Objective 24.8.3
53. A solid metal sphere carries a charge of 5 10–9 C and is at a potential of 400 V, relative to the potential far away. The potential at the center of the sphere is:
A) 400 V
B) –400 V
C) 2 10–6 V
D) 0 V
E) none of these
Difficulty: M
Section: 24-8
Learning Objective 24.8.3
54. A 5-cm radius isolated conducting sphere is charged so its potential is +100 V, relative to the potential far away. The charge density on its surface is:
A) +2.2 10–7 C/m2
B) –2.2 10–7 C/m2
C) +3.5 10–7 C/m2
D) –3.5 10–7 C/m2
E) +1.8 10–8 C/m2
Difficulty: M
Section: 24-8
Learning Objective 24.8.3
55. A conducting sphere has charge Q and its electric potential is V, relative to the potential far away. If the charge is doubled to 2Q, the potential is:
A) V
B) 2V
C) 4V
D) V/2
E) V/4
Difficulty: E
Section: 24-8
Learning Objective 24.8.3