(RIO SALADO) PHY 112 Midterm Exam Questions with
Answers
Question 1
What is the direction of the magnetic field at the position marked by the X?
Correct Answer
right
Page 1 of 33
,Question 2
A positively charged plastic balloon filled with air will stick to a neutrally charged nonmetal ceiling. Which of the following
is the most likely explanation for this behavior?
Correct Answer
The balloon caused the ceiling to polarize, which created a net attracting force between the polarized ceiling and the
balloon.
Question 3
When drawing the equipotential 3D maps, positive point sources will form
Correct Answer
hills
Question 4
An electron moves from a position next to a negatively charged source to a position next to a positively charged source
(see below). Which statement is accurate?
Correct Answer
The electron will lose energy and move to a higher potential.
Page 2 of 33
,Question 5
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
Page 3 of 33
, Question 6
Which of the following correctly identifies the initial direction of the force on the moving positively charged particle (i.e.,
current in the wire is directed to the left as indicated by the arrow ).
Correct Answer
down
Question 7
What is the magnitude of the force on a +3 mC charge moving at a speed of 1000 m/s through a 1.25 T magnetic field?
Correct Answer
3.75 N
Page 4 of 33
Answers
Question 1
What is the direction of the magnetic field at the position marked by the X?
Correct Answer
right
Page 1 of 33
,Question 2
A positively charged plastic balloon filled with air will stick to a neutrally charged nonmetal ceiling. Which of the following
is the most likely explanation for this behavior?
Correct Answer
The balloon caused the ceiling to polarize, which created a net attracting force between the polarized ceiling and the
balloon.
Question 3
When drawing the equipotential 3D maps, positive point sources will form
Correct Answer
hills
Question 4
An electron moves from a position next to a negatively charged source to a position next to a positively charged source
(see below). Which statement is accurate?
Correct Answer
The electron will lose energy and move to a higher potential.
Page 2 of 33
,Question 5
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
Page 3 of 33
, Question 6
Which of the following correctly identifies the initial direction of the force on the moving positively charged particle (i.e.,
current in the wire is directed to the left as indicated by the arrow ).
Correct Answer
down
Question 7
What is the magnitude of the force on a +3 mC charge moving at a speed of 1000 m/s through a 1.25 T magnetic field?
Correct Answer
3.75 N
Page 4 of 33
