49. What electric field has the same energy density as a 1.0 T magnetic field?
A. 1.0 V/m
B. 3.0 108 V/m
C. 9.0 1016 V/m
D. 1.1 10-17 V/m
E. 3.3 10-9 V/m
50. A solenoid of length 2.8 cm and diameter 0.75 cm is wound with 160 turns per cm. When the
current

9.
What is the peak (maximum) power dissipated by a 150 W light bulb attached to a 120 V rms ac
line?
A. 301 W
B. 212 W
C. 150 W
D. 106 W
E. 75.0 W
Giambattista - Chapter 21 #9
Section: 21.2 Electricity in the Home
10.
Two 100 W bulbs differ in that one i

32. A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the
flat surface. If there are 8.00 1024 charge carriers (i.e., electrons) per m3, what is the Hall voltage
generated when 3.40 A flows along the conducto

31.
An ac circuit has a 20 F capacitor, an 80 mH inductor, and a 60 resistor in series. If the
voltage source has an angular frequency of 1000 rad/s, what is the phase constant for the
circuit?
A. 27
B. 53
C. 45
D. 63
E. 88
Giambattista - Chapter 21 #31
S

60.
After the switch is closed in a series LR circuit, what is the current when a time equal to four
time constants has elapsed?
A. (1/5) Imax
B. (15/16) Imax
C. (1/16) Imax
D. 0.018 Imax
E. 0.98 Imax
Giambattista - Chapter 20 #60
Section: 20.10 LR Circui

25. A circular coil lays flat on a horizontal table in a region where the magnetic field is straight down.
The magnetic field is suddenly removed. When viewed from above, what is the direction of the
current in the coil as the field is removed?
A. clockwi

Chapter 21 Summary
Category
# of Questions
Giambattista - Chapter 21
60
Section: 21.1 Sinusoidal Currents and Voltages
6
Section: 21.2 Electricity in the Home
7
Section: 21.3 Capacitors in ac Circuits
9
Section: 21.4 Inductors in ac Circuits
6
Section: 21

4.
Electromagnetic waves of wavelength 1000 nm are classified as
A. radio waves.
B. microwaves.
C. infrared.
D. x-rays.
E. gamma rays.
Giambattista - Chapter 22 #4
Section: 22.4 The Electromagnetic Spectrum
5.
An electromagnetic wave with a wave length ab

41. A 6.0 cm tall object is placed 20 cm in front of a convex mirror with focal -100 cm focal length.
Where is the image formed?
A. 80 cm behind the mirror
B. 25 cm behind the mirror
C. 17 cm behind the mirror
D. 17 cm in front of the mirror
E. 25 cm in f

16.
Light of wavelength 600 nm in air goes into a medium where the index of refraction is 1.73.
What is the frequency of this light in the medium?
A. 5.00 1014 Hz
B. 2.89 1014 Hz
C. 8.65 1014 Hz
D. 3.46 1014 Hz
E. 1.04 1014 Hz
Giambattista - Chapter 22 #1

6.
The magnitude of the magnetic force on a charge depends on
A. the velocity component perpendicular to the magnetic field.
B. the magnitude of the charge.
C. the magnitude of the magnetic field.
D. the sign of the charge.
E. three of the items are corre

20.
For a capacitor in and ac circuit, how much energy is stored in the capacitor at the instant when
current is zero?
A. 0.707 maximum
B. half
C. zero
D. maximum
Giambattista - Chapter 21 #20
Section: 21.3 Capacitors in ac Circuits
21.
A capacitor is con

37. If the number of turns is tripled for an inductor of fixed length and fixed cross-sectional area, what
happens to its inductance?
A. it stays the same
B. it triples
C. it becomes 9 times the original value
D. it decreases by a factor of 3
E. it decrea

29. A 6.0 resistor and a 3.0 resistor are connected in series to a 1.5 V battery of negligible internal
resistance. What is the current in the 3.0 resistor?
A. 2.0 A
B. 0.50 A
C. 0.25 A
D. 0.17 A
E. 0.75 A
30. A 6.0 resistor and a 3.0 resistor are connect

20. A proton is moving at 3.0 106 m/s and experiences a magnetic force of magnitude 2.5 10-16 N.
If the magnetic field makes an angle of 40 with respect to the velocity of the proton, what is the
field's magnitude?
A. 1.7 10-4 T
B. 3.3 10-4 T
C. 4.1 10-4

18.
A coil is rotated in a magnetic field about an axis perpendicular to the field. During each
rotation, how many times does the flux through the coil equal zero?
A. 0
B. 1
C. 2
D. 4
E. more than 4
Giambattista - Chapter 20 #18
Section: 20.3 Faradays Law

27.
An electric field perpendicular to a magnetic field is used as a velocity selector for Li+ ions,
selecting the velocity v1. Next, Li+ ions are sent through the same velocity selector, selecting
velocity v2. If neither the electric nor magnetic fields

51. A flashlight, which uses two 1.5 V batteries in series, is turned on for 2.0 minutes. If the current in
the flashlight is 100 mA, what is the energy dissipated?
A. 12 J
B. 9.0 J
C. 72 J
D. 36 J
E. 18 J
52. A good ammeter has _ resistance and a good vo

28. A light ray goes through two thick rectangular slabs of glass, each of the same uniform thickness.
The first slab has index of refraction n1 and the second n2. If n1 < n2. How does the original angle of
incidence i into the first slab compare to the f

60. An ideal diode in an ac circuit
A. doubles the current.
B. halves the current.
C. permits the current to flow in only one direction.
D. permits the current to flow in one direction and double the current to flow in the other.
E. permits the current to

40. If the rms value of the electric field is 9.0 V/m at a distance of 6.0 m from an isotropic source, what
is the rms value of the magnetic field at a distance of 12 m from the source?
A. 3.0 10-8 T
B. 1.5 10-8 T
C. 0.75 10-8 T
D. 0.38 10-8 T
E. 0.19 10-

8. A light ray strikes the surface of sapphire (n = 1.77) at an angle of incidence of 40.0. What angle
of refraction results?
A. 21.3
B. 50.0
C. 59.7
D. 57.0
E. 17.7
9. A ray of light enters a pane of glass with an angle of incidence of 37. The index of r

22.
A 12.0 V battery is placed across a 4.00 resistor. If the current through the resistor is 2.80 A,
what is the terminal voltage of the battery?
A. 12.0 V
B. 12.8 V
C. 11.6 V
D. 11.2 V
E. 9.6 V
Giambattista - Chapter 18 #22
Section: 18.6 Series and Para

51.
An ideal solenoid has a length of 25 mm. If the windings are compressed so that the length is
reduced to of its original length how does the inductance change?
A. of original
B. to of original
C. twice the original
D. quadruple the original
Giambattis

17.
A cyclotron with a magnetic field of 1.2 T is used to accelerate protons. How long does it take
for the protons to make one complete trip around the cyclotron at a radius of 25 cm?
A. 11 ns
B. 28 ns
C. 32 ns
D. 48 ns
E. 55 ns
Giambattista - Chapter 19

42.
As the ac frequency in an RLC circuit is increased to very high values, which of the
contributions to the impedance dominates?
A. the capacitive reactance
B. the inductive reactance
C. the resistance
D. the combined capacitive reactance and the resist

47. In a series LRC circuit the rms voltage across the resistor is 80.0 V, across the capacitor is 120 V,
and across the inductor is 60.0 V. What is the rms voltage applied to this circuit?
A. 60.0 V
B. 80.0 V
C. 100 V
D. 120 V
E. 140 V
48. A series RLC c

41.
If R1 = 6 , R2 = 8 , R3 = 2 , 1 = 4 V, and 2 = 14 V, what is the current in R2?
A. 1 A
B. 2 A
C. 3 A
D. 4 A
E. 5 A
Giambattista - Chapter 18 #41
Section: 18.7 Circuit Analysis Using Kirchhoffs Rules
42.
If R1 = 6.0 , R2 = 8.0 , R3 = 2.0 , 1 = 4.0 V, a

8. A 150 W light bulb is operating on a 120 V rms ac line. What is the rms current in the bulb?
A. 2.50 A
B. 1.67 A
C. 1.50 A
D. 1.25 A
E. 0.883 A
9. What is the peak (maximum) power dissipated by a 150 W light bulb attached to a 120 V rms ac
line?
A. 301

46.
A power line carries 1000 A at a height of 20 m above the ground. What is the resulting
magnetic field at ground level?
A. 50 mT
B. 0.13 mT
C. 13 T
D. 10 T
E. 5.0 T
Giambattista - Chapter 19 #46
Section: 19.8 Magnetic Field due to an Electric Current

40. In the diagram, if the current through R1 is 5 A up and if the current through R3 is 3 A up, what is
the current in R2?
A. 8 A up
B. 8 A down
C. 2 A up
D. 2 A down
E. more information is needed
41. If R1 = 6 , R2 = 8 , R3 = 2 , 1 = 4 V, and 2 = 14 V,

60. After the switch is closed in a series LR circuit, what is the current when a time equal to four time
constants has elapsed?
A. (1/5) Imax
B. (15/16) Imax
C. (1/16) Imax
D. 0.018 Imax
E. 0.98 Imax
Chapter 20 Key
1.
A metal rod of length L moves with v

53. A thin lens of focal length 12.5 cm has a 5.0 cm tall object placed 10 cm in front of it. Where will the
image be formed?
A. 2.5 cm behind the lens
B. 5.6 cm behind the lens
C. 5.6 cm in front of the lens
D. 50 cm behind the lens
E. 50 cm in front of