PHY 112 - Rio Salado Exam Questions and Answers
Question 1
What is the critical angle of a light ray traveling through a material 1 (n = 1.6) incident on material 2 (n = 1.3)?
Correct Answer
54.3°
Question 2
Two resistors, A and B, individually connect to a 9V battery. A student notices that resistor A is warmer than resistor B.
Which resistor has the greatest resistance?
Correct Answer
Resistor B has the greatest resistance.
Question 3
Which of the following statements regarding equipotentials and electric fields is accurate?
Correct Answer
electric field lines are perpendicular to equipotential lines
Page 1 of 32
,Question 4
What is the direction of the magnetic field at the position marked by the X?
Correct Answer
right
Question 5
A student solves for the image height produced by a curved mirror and obtains a negative value. This means the
Correct Answer
image is inverted
Question 6
Which of the following correctly shows the equipotentials near a negative point source?
Correct Answer
C (the one with only circles)
Question 7
Which of the following correctly indicates the result of cutting the following permanent magnet in half along the dotted
line as shown below?
Correct Answer
Each half will have both north and south poles.
Page 2 of 32
,Question 8
Images produced with diverging lenses are always
Correct Answer
virtual and upright
Question 9
A charged particle moving to the right enters a uniform magnetic field directed into the page. The charged particle
experiences a magnetic force. Which of the following is a true statement (disregard any gravitational effects)?
Correct Answer
The speed of the particle will remain the same.
Question 10
A particle with a charge of +2 μC is at the position marked by the x. Which statement concerning the particle's energy at
this position is most accurate?
Correct Answer
the particle will have a positive energy term
Question 11
An electron moves through a potential difference of 1500 V. The magnitude of the change in potential energy experienced
by the electron is
Correct Answer
1500 eV
Page 3 of 32
, Question 12
Two parallel wires are horizontally oriented. The top wire has current of some value I directed to the left, and the bottom
wire has current of 2 x I directed to the right. At what point will the magnetic fields cancel out?
Correct Answer
some point above the top wire
Question 13
Two charged particles each with a net charge of -q are a distance r apart. The electric force F is measured. The distance
between the particles then doubles to 2r, and the amount of charge on BOTH charges doubles to -2q. Relative to the
original force, what is the new electric force?
A) 1/2 F
B) 2 F
C) 4 F
D) F
Correct Answer
D) F
Page 4 of 32
Question 1
What is the critical angle of a light ray traveling through a material 1 (n = 1.6) incident on material 2 (n = 1.3)?
Correct Answer
54.3°
Question 2
Two resistors, A and B, individually connect to a 9V battery. A student notices that resistor A is warmer than resistor B.
Which resistor has the greatest resistance?
Correct Answer
Resistor B has the greatest resistance.
Question 3
Which of the following statements regarding equipotentials and electric fields is accurate?
Correct Answer
electric field lines are perpendicular to equipotential lines
Page 1 of 32
,Question 4
What is the direction of the magnetic field at the position marked by the X?
Correct Answer
right
Question 5
A student solves for the image height produced by a curved mirror and obtains a negative value. This means the
Correct Answer
image is inverted
Question 6
Which of the following correctly shows the equipotentials near a negative point source?
Correct Answer
C (the one with only circles)
Question 7
Which of the following correctly indicates the result of cutting the following permanent magnet in half along the dotted
line as shown below?
Correct Answer
Each half will have both north and south poles.
Page 2 of 32
,Question 8
Images produced with diverging lenses are always
Correct Answer
virtual and upright
Question 9
A charged particle moving to the right enters a uniform magnetic field directed into the page. The charged particle
experiences a magnetic force. Which of the following is a true statement (disregard any gravitational effects)?
Correct Answer
The speed of the particle will remain the same.
Question 10
A particle with a charge of +2 μC is at the position marked by the x. Which statement concerning the particle's energy at
this position is most accurate?
Correct Answer
the particle will have a positive energy term
Question 11
An electron moves through a potential difference of 1500 V. The magnitude of the change in potential energy experienced
by the electron is
Correct Answer
1500 eV
Page 3 of 32
, Question 12
Two parallel wires are horizontally oriented. The top wire has current of some value I directed to the left, and the bottom
wire has current of 2 x I directed to the right. At what point will the magnetic fields cancel out?
Correct Answer
some point above the top wire
Question 13
Two charged particles each with a net charge of -q are a distance r apart. The electric force F is measured. The distance
between the particles then doubles to 2r, and the amount of charge on BOTH charges doubles to -2q. Relative to the
original force, what is the new electric force?
A) 1/2 F
B) 2 F
C) 4 F
D) F
Correct Answer
D) F
Page 4 of 32
