Rio Salado College – Physics 112 Final Exam Testbank Questions
and Answers (2025-2026) – Complete Exam Material
Introduction:
This document contains the full testbank for the Physics 112 final
exam at Rio Salado College for the academic year 2025-2026. It
includes multiple-choice questions, true/false questions, and
calculation-based problems covering all major course topics such as
electromagnetism, optics, relativity, atomic structure, and wave
behavior. Each question is provided with the correct answer, making
it a comprehensive study resource for exam preparation.
Exam Questions and Answers:
16. How is the wavelength of light affected when it enters a
material with a higher index of refraction?
A) It increases
B) It decreases
C) It remains the same
D) It becomes polarized--- correct answer --- B) It decreases
17. What is the consequence of an observer being in an
accelerating frame of reference while making measurements
according to Newton's laws of motion?
a) The measurements become more precise
b) Newton's laws no longer hold true in that frame of reference
,c) The observer's velocity becomes constant
d) The object being observed experiences constant velocity
motion--- correct answer --- b) Newton's laws
no longer hold true in that frame of reference
18. What was the purpose of Michaelson and Morley's experiment
in 1887?
a) To measure the speed of light relative to Earth
b) To detect the presence of the ether
c) To refine Maxwell's electromagnetic wave equations
d) To observe the behavior of particles in space--- correct
answer --- b) To detect the presence of the ether
19. 5. What did Michaelson and Morley's experiment reveal about
the speed of light?
a) The speed of light is relative to Earth's motion
b) The speed of light depends on the medium it travels through
c) The speed of light is constant and independent of Earth's
motion
d) The speed of light varies based on the observer's frame of
reference--- correct answer --- c) The speed of light is constant and
independent of Earth's motion
20. What are the two postulates of Einstein's Special Theory of
Relativity?
,a) The speed of light depends on the observer's motion, and all
laws of physics work differently for observers moving at different
speeds
b) All observers measure the same speed of light, and the laws of
physics work differently for observers moving at different speeds
c) All laws of physics work the same for observers moving at
constant speeds, and all observers measure the same speed of light
d) The laws of physics are relative to an observer's frame of
reference, and the speed of light is constant regardless of the
observer's motion--- correct answer --- c) All laws of physics
work the same for observers moving at constant speeds, and all
observers measure the same speed of light
21. What does the Lorentz factor represent in the context of
special relativity?
a) The rate of change of time with respect to velocity
b) The factor by which time is dilated in moving frames of
reference
c) The speed of light relative to the observer's motion
d) The difference in time between two observers in relative
motion--- correct answer --- b) The factor by
which time is dilated in moving frames of reference
1. In the context of Faraday's law, what does the negative sign in
the equation signify?
A) It indicates a positive change in flux
, B) It indicates a negative change in flux
C) It signifies the direction of the induced EMF
D) It signifies the direction of the magnetic field--- correct
answer --- C) It signifies the direction of the induced
EMF
2. What is the purpose of a transformer in an electrical circuit?
A) To convert electric energy into work
B) To change the direction of current flow
C) To change the voltage in a circuit
D) To increase the resistance of the circuit--- correct answer ---
C) To change the voltage in a circuit
3. According to Faraday's law, what induces an EMF in a
generator?
A) Change in the magnetic field strength
B) Change in the loop area
C) Change in the angle between the loop and the magnetic field
D) Change in the number of loops--- correct answer --- C) Change
in the angle between the loop and the magnetic field
4. What does Ampere's circuit law describe?
A) The behavior of electric field lines
B) The behavior of magnetic field lines
C) How magnetic fields are created by moving charges or
changing electric fields
and Answers (2025-2026) – Complete Exam Material
Introduction:
This document contains the full testbank for the Physics 112 final
exam at Rio Salado College for the academic year 2025-2026. It
includes multiple-choice questions, true/false questions, and
calculation-based problems covering all major course topics such as
electromagnetism, optics, relativity, atomic structure, and wave
behavior. Each question is provided with the correct answer, making
it a comprehensive study resource for exam preparation.
Exam Questions and Answers:
16. How is the wavelength of light affected when it enters a
material with a higher index of refraction?
A) It increases
B) It decreases
C) It remains the same
D) It becomes polarized--- correct answer --- B) It decreases
17. What is the consequence of an observer being in an
accelerating frame of reference while making measurements
according to Newton's laws of motion?
a) The measurements become more precise
b) Newton's laws no longer hold true in that frame of reference
,c) The observer's velocity becomes constant
d) The object being observed experiences constant velocity
motion--- correct answer --- b) Newton's laws
no longer hold true in that frame of reference
18. What was the purpose of Michaelson and Morley's experiment
in 1887?
a) To measure the speed of light relative to Earth
b) To detect the presence of the ether
c) To refine Maxwell's electromagnetic wave equations
d) To observe the behavior of particles in space--- correct
answer --- b) To detect the presence of the ether
19. 5. What did Michaelson and Morley's experiment reveal about
the speed of light?
a) The speed of light is relative to Earth's motion
b) The speed of light depends on the medium it travels through
c) The speed of light is constant and independent of Earth's
motion
d) The speed of light varies based on the observer's frame of
reference--- correct answer --- c) The speed of light is constant and
independent of Earth's motion
20. What are the two postulates of Einstein's Special Theory of
Relativity?
,a) The speed of light depends on the observer's motion, and all
laws of physics work differently for observers moving at different
speeds
b) All observers measure the same speed of light, and the laws of
physics work differently for observers moving at different speeds
c) All laws of physics work the same for observers moving at
constant speeds, and all observers measure the same speed of light
d) The laws of physics are relative to an observer's frame of
reference, and the speed of light is constant regardless of the
observer's motion--- correct answer --- c) All laws of physics
work the same for observers moving at constant speeds, and all
observers measure the same speed of light
21. What does the Lorentz factor represent in the context of
special relativity?
a) The rate of change of time with respect to velocity
b) The factor by which time is dilated in moving frames of
reference
c) The speed of light relative to the observer's motion
d) The difference in time between two observers in relative
motion--- correct answer --- b) The factor by
which time is dilated in moving frames of reference
1. In the context of Faraday's law, what does the negative sign in
the equation signify?
A) It indicates a positive change in flux
, B) It indicates a negative change in flux
C) It signifies the direction of the induced EMF
D) It signifies the direction of the magnetic field--- correct
answer --- C) It signifies the direction of the induced
EMF
2. What is the purpose of a transformer in an electrical circuit?
A) To convert electric energy into work
B) To change the direction of current flow
C) To change the voltage in a circuit
D) To increase the resistance of the circuit--- correct answer ---
C) To change the voltage in a circuit
3. According to Faraday's law, what induces an EMF in a
generator?
A) Change in the magnetic field strength
B) Change in the loop area
C) Change in the angle between the loop and the magnetic field
D) Change in the number of loops--- correct answer --- C) Change
in the angle between the loop and the magnetic field
4. What does Ampere's circuit law describe?
A) The behavior of electric field lines
B) The behavior of magnetic field lines
C) How magnetic fields are created by moving charges or
changing electric fields
