33. A 1.00 nC charge is placed on the x-axis at x = - 1.00 m. A second 1.00 nC charge is placed on the
x-axis at x = 1.00 m. A third charge of 1.00 nC is placed on the y-axis at y = - 1.00 m. A fourth
charge is place on the y-axis at y = 1.00 m. What is t
Section: 16.4 The Electric Field
30.
Two charges are located on the x-axis. A 22 C charge is located at the origin and a 47 C
charge is located at x = 4.0 m. What is the magnitude of the electric field at x = 7.5 m?
A. 4.0 105 N/C
B. 3.8 104 N/C
C. 5.7 10
12.
The Coulomb constant, k, has a value of 8.99 109 Nm2/C2. The permittivity of free space, o,
has the units
A. Nm2/C2.
B. Nm/C.
C. C/(Nm).
D. C2/(Nm2).
E. that are not given.
Giambattista - Chapter 16 #12
Section: 16.3 Coulombs Law
13.
Two point charges
20.
Three point charges are positioned as follows: q1 is at (0.00 m, 0.00 m), q2 is at (1.20 m, 0.00
m), and q3 is at (1.20 m, 1.60 m). If q1 = 1.00 C, q2 = 2.00 C, and q3 = 3.00 C, what is the
magnitude of the force on q2?
A. 2.45 10-2 N
B. 1.25 10-2 N
C
21. Four point charges are located at the corners of a square, 1.00 m by 1.00 m. On each of two
diagonally opposite corners are 1.00 C charges. On each of the other two corners are -1.00 C
charges. What is the direction of the force on each charge?
A. pos
54.
According to the second law of thermodynamics, for any process that may occur within an
isolated system, which answer applies?
A. entropy remains constant.
B. entropy increases.
C. entropy decreases.
D. depends on the rate of change of the process.
Gi
42.
A refrigerator extracts 65 J of heat from a heat reservoir at 0.00C. If the coefficient of
performance of the refrigerator is 2.5, then how much work is needed to run the refrigerator?
A. 26 J
B. 48 J
C. 75 J
D. 90 J
Giambattista - Chapter 15 #42
Sect
49.
An electron is fired through a pair of deflection plates, which produce a 2.00 cm long region with
an electric field of 4000 N/C perpendicular to the electron's initial velocity. If the initial speed of
the electron is 1.00 107 m/s, what is its new co
23. A conducting sphere of radius 20 cm has a charge Q placed on it producing a field of magnitude
E0 at its surface. More charge is added to the surface until the magnitude of the field at the surface
is 2 E0. How much charge was added to the surface?
A.
Chapter 16 Summary
Category
# of Questions
Giambattista - Chapter 16
67
Section: 16.1 Electric Charge
5
Section: 16.2 Electrical Conductors and Insulators
4
Section: 16.3 Coulombs Law
16
Section: 16.4 The Electric Field
18
Section: 16.5 Motion of a Point
47. If the plate area, plate separation, and dielectric constant all are doubled for a parallel plate
capacitor, what happens to the capacitance?
A. it stays the same
B. it doubles
C. it quadruples
D. it halves
E. it quarters
48. If the plate area, plate
Chapter 16 Key
1.
The word electric comes from the Greek word for
A. wool.
B. amber.
C. silk.
D. glass.
E. lodestone.
Giambattista - Chapter 16 #1
Section: 16.1 Electric Charge
2.
How many electrons does it take to make one coulomb of negative charge?
A.
64.
Two coins, each with a Head and a Tail, are tossed randomly onto a table. The microstate is
defined as the "number of Heads showing". The number of Heads can be, 0, 1, 2. What value
for the "number of Heads showing" has the greatest number of microsta
57.
If the potential difference across the plates of a capacitor is doubled, what happens to the
energy stored?
A. it stays the same
B. it doubles
C. it quadruples
D. it halves
E. it increases by a factor of 1.414
Giambattista - Chapter 17 #57
Section: 17
58.
A thin spherical shell of radius 20.0 cm has 5.0 C of charge uniformly distributed over its
surface. What is the magnitude of the electric field 2.00 m from the center of the sphere?
A. 2.3 104 N/C
B. 1.1 104 N/C
C. 1.4 103 N/C
D. 2.3 106 N/C
E. 0
Gia
30.
An engine takes in 150 J energy from a 400 K thermal source. If the engine discharges energy
into a thermal reservoir at 150K, then what is the maximum amount of work one can get out of
the engine?
A. 93.8 J
B. 84.2 J
C. 28.5 J
D. 168 J
Giambattista -
18.
A hollow conducting sphere of radius 12 cm had a charge of 18 C placed on it. What is the
potential 20 cm from the center of the sphere?
A. 0 V
B. 15 V
C. 73 V
D. 8.1 105 V
E. 4.1 105 V
Giambattista - Chapter 17 #18
Section: 17.2 Electric Potential
19
57. A thin spherical shell of radius 20.0 cm has 5.0 C of charge uniformly distributed over its surface.
What is the electric field 10.0 cm from the center of the sphere?
A. 4.5 106 N/C inward
B. 4.5 106 N/C outward
C. 2.3 106 N/C inward
D. 2.3 106 N/C ou
28.
The unit V is the same as a
A. N/m.
B. J/N.
C. C/m.
D. J/C.
E. C/N.
Giambattista - Chapter 17 #28
Section: 17.2 Electric Potential
29.
Two large equipotent surfaces are flat and parallel and separated by a relatively small distance
compared to their s
59. To store 80 mJ of energy in a 100 F capacitor, what voltage is necessary?
A. 10 V
B. 45 V
C. 4.0 V
D. 40 V
E. more than 120 V
60. If the charge on a parallel plate capacitor doubles, which of the following also doubles?
A. the electric field between t
38.
If helium nuclei and protons are each accelerated from rest through the same potential
difference, how do the resulting speeds compare?
A. the protons attain twice the speed of the helium nuclei
B. the protons attain 1.4 times the speed of the helium
45. A 1.65 nC charge experiences an acceleration of 6.33 107 m/s2 in an electric field. What is the
magnitude of the electric field?
A. 3.84 1016 N/C
B. 1.65 10-9 N/C
C. 14.9 N/C
D. 2.67 10-19 N/C
E. there isn't enough information in the problem to solve
17. A 1.56-V battery has an internal resistance of 0.120 . What is the maximum current that can be
drawn from this battery?
A. infinite (or at least 1000's of amps)
B. 1.56 A
C. 0.190 A
D. 13.0 A
E. 7.50 A
18. A potential difference of 12.4 V is placed ac
8.
Three 1.0 C charges are placed along the x-axis, one charge at x = -10 cm, another at the
origin, and the last one at x = 10 cm. What is the total potential energy of this arrangement?
A. 0.27 J
B. -0.27 J
C. 0.72 J
D. 0.23 J
E. infinite (or indetermin
11. The electric potential unit volt is equal to a
A. CN.
B. C2N/s.
C. J2/C.
D. J/C.
E. J/C2.
12. A 2.5-mC charge is on the y-axis at y = 3.0 m and a 6.3-mC charge is on the x-axis at x = 3.0 m.
What is the direction of the potential at the origin?
A. 22.
49.
An air-filled 3.0 nF capacitor is charged to 8.0 V. If the plate separation is 100 m, what is the
energy density in the electric field?
A. 57 J/m3
B. 280 J/m3
C. 57 mJ/m3
D. 28 mJ/m3
E. more than 50 J/m3
Giambattista - Chapter 17 #49
Section: 17.5 Cap
5. A 2.50 A current is carried by a copper wire of radius 1.0 mm. If the density of conduction electrons
is 8.0 1028/m3, what is the drift velocity of the conduction electrons?
A. 3.0 108 m/s
B. 3.2 10 4 m/s
C. 1.6 10 5 m/s
D. 6.2 10 4 m/s
E. 6.2 10 5 m/s
9. Some household appliances have plugs with two prongs while others have three prongs. The
additional prong is
A. for direct current.
B. for 120-Hz voltage.
C. to connect to ground.
D. for additional mechanical strength.
E. for 240-Hz voltage.
10. Two eq
35. If protons are accelerated from rest in a Van de Graff accelerator through a potential difference of
1.00 MV, what is their resulting speed?
A. 3.67 108 m/s
B. 6.25 107 m/s
C. 9.79 106 m/s
D. 1.38 107 m/s
E. 6.92 106 m/s
36. A helium nucleus is accele
39.
A point charge of 3.00 C is located on the y-axis at y = 4.0 m, another point charge of 6.0 C is
located on the x-axis at x = 5.0 m, and a third charge of 7.2 C is located at (5.0 m, 4.0 m).
What is the magnitude of the force on the 7.2 C charge?
A. 1