SAMPLE PROBLEMS
Reflection and Refraction
D. Finkenthal - 2013
4.
Reflection and Refraction
1.
In the following figures, there is a triangle of
glass in air. Which best shows the refracted ray
of light?
5.
A ray of light (incident ray 1) approaches a
sphe
Physics 201
Solution Set 07
CHAPTER 30: AC Circuits
30[39, 40, 62]
CHAPTER 31: Electromagnetic Waves
31[Q5, 9, 10, 14, 15, 49]
CHAPTER 30
39. We find the frequency from Eq. 30-23b for the reactance of an inductor.
X
660
X L = 2 fL f = L =
= 3283 Hz 3300
Physics 201
Solution Set 08
CHAPTER 32: Light: Reflection and Refraction
32[1, 4, 9, 11, 12, 15, 24, 25, 38, 45, 46, 53, 58, 59]
1.
Because the angle of incidence must equal the angle of reflection, we
see from the ray diagrams that the ray that reflects
Physics 201
Solution Set 10
CHAPTER 34: Wave Nature of Light
34[4, 9, 25, 27, 49, 61]
CHAPTER 35: Diffraction and Polarization
35[1, 7, 9, 25, 79, 35, 36, 52, 57]
4.
For constructive interference, the path difference is a multiple of the wavelength, as gi
Physics 201
Solution Set 09
CHAPTER 33: Lenses and Optical Instruments
33[4, 11, 12, 13, 17, 20, 21, 22, 25, 87, 41, 45, 48, 49, 53, 55, 99, 61, 72]
4.
To form a real image from a real object requires a converging lens. We find the focal length of the
len
Physics 201
Homework Solutions 04b
CHAPTER 24: Capacitors
24[5, 7, 17, 29, 31, 37, 43, 71]
Chapter 24: Capacitors
5.
After the first capacitor is disconnected from the battery, the total charge must remain constant. The
voltage across each capacitor must
Physics 201
Homework Set 04
CHAPTER 26: DC Circuits
26[3, 4, 10, 16, 19, 44, 48, 69, 78, 83, 84]
261 Emf and Terminal Voltage
3.
4.
We take the low-resistance ammeter to have no resistance. The
circuit is shown. The terminal voltage will be 0 volts.
e 1.5
QUANTUM PHYSICS PROBLEMS
Physics 201 Spring, 2013
Instructor: Dr. Finkenthal
1.
Quantum physics relies on the fact that light comes in packets of energy called
A. photons
B. protons
C. electrons
D. pions
2.
The energy of a photon is given by the relation
Physics 201
Homework Solutions 01
CHAPTER 21: Electric Charge & Field
21[6, 8, 13, 17, 27, 42, 56*, 63, 100, 88]
*Problems are Optional
Problems
215 Coulombs Law
1 mC = =
= 10-3 C, 1 C 106 C, 1 nC 10-9 C.
6.
Since the magnitude of the force is inversely p
Physics 201
Homework Solutions 02
CHAPTER 23: Electrical Potential
23[9, 18, 29, 31, 44]
CHAPTER 24: Capacitors
24[5, 7, 17, 29, 31, 37, 43, 71]
232 Potential Related to Electric Field
9.
To find the limiting value, we assume that the E-field at the radiu
Physics 201
Homework Solutions 03
CHAPTER 25: Electric Currents and Resistance
25[9, 11, 25, 33, 34, 45, 49, 55, 63]
252 and 253 Electric Current, Resistance, Ohms Law
9.
(a) Use Eq. 25-2b to find the resistance.
12 V
V
R= =
= 20 (2 sig. fig.)
I 0.60 A
(b
Answers to MC Quantum
Problems
Question
Answer
1
A
2
B
3
D
4
B
5
C
6
B
7
B
8
C
9
A
10
A
11
A
12
A
13
A
14
B
15
A
16
C
17
B
18
E
19
E
20
A
21
B
22
B
23
E
24
D
25
D
26
B
27
C
28
C
29
B
30
B
31
D
32
A
33
B
34
A
35
D
36
D
37
A
38
B
39
B
40
D
41
A
42
D
43
B
44
Physics 201
Solution Set 05
CHAPTER 27 & 28: Magnetism
27[5, 16, 17, 19, 36, 44, 59]
28[2, 3, 5, 13, 25, 68]
5.
(a) By the right hand rule, the magnetic field must be pointing up, and so the top pole face must be
a South pole .
(b) Use Eq. 27-2 to relate
Physics 201
Solution Set 06
CHAPTER 29: Electromagnetic Induction
29[Q9, 3, 4, 9, 12, 14, 24, 28, 29, 46, 65]
Q9. (a) The current through RA will be to the right. The field due to the current in coil B will be to the
left. As coil B is moved toward coil A
Physics 201
Homework Set 02
CHAPTER 23: Electrical Potential
23[9, 18, 29, 31, 44]
CHAPTER 24: Capacitors
24[5, 7, 17, 29, 31, 37, 43, 71]
232 Potential Related to Electric Field
9. (I) What minimum radius must a large conducting sphere of an electrostati
Physics 201
Homework Set 04
CHAPTER 26: DC Circuits
26[ 3, 4, 10, 16, 19, 44, 48, 69, 78, 83, 84]
261 Emf and Terminal Voltage
3. (II) A 1.5-V dry cell can be tested by connecting it to a low-resistance ammeter. It should be able to
supply at least 25 A.
Physics 201
Homework Set 05
CHAPTER 27 & 28: Magnetism
27[5, 16, 17, 19, 36, 44, 59]
28[2, 3, 5, 13, 25, 68]
5. (II) The force on a wire is a maximum of 7.50 102 N when placed between the pole faces of a
magnet. The current flows horizontally to the right
Physics 201
Homework Set 07
CHAPTER 30: AC Circuits
30[39, 40, 62]
CHAPTER 31: Electromagnetic Waves
31[Q5, 9, 10, 14, 15, 49]
39. (I) At what frequency will a 32.0-mH inductor have a reactance of 660?
40. (I) What is the reactance of a 9.2-mF capacitor a
Physics 201
Homework Set 06
CHAPTER 29: Electromagnetic Induction
29[Q9, 3, 4, 9, 12, 14, 24, 28, 29, 46, 65]
Q9. In the figure below, determine the direction of the induced current in resistor RA (a) when coil B is
moved toward coil A, (b) when coil B is
Physics 201
Homework Set 01
CHAPTER 21: Electric Charge & Field
21[6, 8, 13, 17, 27, 42, 56*, 63, 100, 88]
*Problems are Optional
215 Coulombs Law
1 mC = =
= 10-3 C, 1 C 106 C, 1 nC 10-9 C.
6. (II) Two charged dust particles exert a force of 3.210-2 N on
Answers to MC Magnetism Probs
Question Answer
1
C
2
C
3
D
4
B
5
C
6
C
7
B
8
B
9
A
10
D
11
A
12
A
13
E
14
B
15
A
16
B
17
B
18
E
19
D
20
B
21
D
22
C
23
B
24
C
25
B
26
A
27
A
28
C
29
C
30
B
7
B
31
A
32
B
33
D
34
B
35
A
36
C
37
B
38
A
39
C
40
A
41
C
42
C
43
E
ELECTROMAGNETISM PROBLEMS
Physics 201
1.
The figure below shows 3 bar magnets of equal
sizes and equal strengths. At which of the points
labeled A to E is the magnetic field approximately
equal to zero? (Points B and C are at equal
distances from the magn
SAMPLE PROBLEMS
Lenses and Mirrors
D. Finkenthal - 2013
1.
An object is placed along the axis of a concave
mirror halfway between its focus and center. In
terms of the focal length f, how far from the
mirror is the image?
A. 2f/3
B. 3f/2
C. 2f
D. 3f
6.
Wh
SAMPLE PROBLEMS
Interference, Diffraction, Thin-Films, Polarization
D. Finkenthal
5.
Interference
1.
Interference of light is evidence supporting
A. the wave theory of light.
B. the wave theory except in the case of
constructive interference.
C. both the
Physics 201
Homework Set 08
CHAPTER 32: Light: Reflection and Refraction
32[1, 4, 9, 11, 12, 15, 24, 25, 38, 45, 46, 53, 58, 59]
1. (I) When you look at yourself in a 60-cm-tall plane mirror, you see the same amount of your body
whether you are close to t
Physics 201
Homework Set 09
CHAPTER 33: Lenses and Optical Instruments
33[4, 11, 12, 13, 17, 20, 21, 22, 25, 87, 41, 45, 48, 49, 53, 55, 99, 61, 72]
331 and 332 Thin Lenses
4.(II) A certain lens focuses an object 1.85 m away as an image 48.3 cm on the oth
Physics 201
Homework Set 03
CHAPTER 25: Electric Currents and Resistance
25[9, 11, 25, 33, 34, 45, 49, 55, 63]
252 and 253 Electric Current, Resistance, Ohms Law
9. (II) A 12-V battery causes a current of 0.60 A through a resistor. (a) What is its resista