RIO SALADO Physics 112 Midterm Exam
RIO SALADO PHYSICS 112 MIDTERM EXAM NEWEST 2025/2026
WITH COMPLETE 100 QUESTIONS AND CORRECT ANSWERS
|ALREADY GRADED A+||BRAND NEW VERSION!
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) - ANSWER-The
speed of the of the particle will remain the same
Which of the following resistors will experience the largest flow rate of charge? All
the resistors have identical resistance - ANSWER-R4
A light bulb connects to a battery. A second, identical light bulb connects in
parallel to the first light bulb. The connecting wires have negligible resistance.
When the switch is closed, the original light bulb will - ANSWER-experience no
change in brightness
What is the direction of the field halfway between two horizontal parallel wires if
the top wire has a current of 4A to the left and the bottom wire has a current of
2A to the right - ANSWER-out of the page
Which of the following correctly ranks the resistors in order from largest voltage
drop across the resistor to smallest voltage drop? All the resistors have identical
resistances - ANSWER-R4>R3>R1=R2
1|Page
, RIO SALADO Physics 112 Midterm Exam
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)
<----------- pipe
positive particle-------> - ANSWER-down
What is the magnitude fo the force on a +3mC charge moving at a speed of
1000m/s through a 1.25T magnetic field - ANSWER-Fm=BvQ
1.25 x 1000 x 3x10^-3
3.75 N
Two parallel wires are horizontally oriented. The top wire has a current of some
value I directed to the left, and the bottom wire has current of 2xI directed to the
right. At what point will the magnetic fields cancel out? - ANSWER-some point
above the wire
A positively charged 2mC particle moving in the upward direction at a speed of
20m/s enters a 3.0T field directed into the page. The particle path curves with a
radius of 6cm. What is the mass of the particle - ANSWER-qvB= mv^2/r
m=qbr/v
m= (2x10^-3) (3T) 0.06)/20
1.8 x10^-5
Which of the following correctly identifies the initial direction of the force on the
moving positively charged particle
OOOO
2|Page
, RIO SALADO Physics 112 Midterm Exam
OOOO
OOOO
OOOO
^
I
I
+ particle - ANSWER-right
What is the direction of the magnetic force on the wire
current directed into the screen - ANSWER-right
what is the magnitude of the force on a 0.5m wire that has 4.0 A of current in a
uniform magnetic field of 2.0T? The wire and the magnitic field are perpendicular
to each other - ANSWER-F=BIL
2x4x0.5
F=4N
Which of the following correctly identifies the initial direction of the force on the
moving negatively charged particle
<--------
<--------
<------ negative particle
<-------
<------- - ANSWER-no force
3|Page
, RIO SALADO Physics 112 Midterm Exam
which of the following statements regarding static electric charge is most accurate
- ANSWER-force is proportional to the inverse square distance between the
charged particles
An object has a positive net charge. The most likely reason for the net charge is
that - ANSWER-electrons were transferred off the object
what is the net charge on an object that has gained 8x10^13 electrons - ANSWER-
8x10 ^13 * 1.6 x10^-19
=-1.3 x10^-5
which of the following processes will not result in a change in net charge on an
object? - ANSWER-polarization
which of the following is an example of an insulation - ANSWER-a piece of paper
a block of wax
a block of glass
all of the above are examples
which of the following statements concerning charge is most accurate - ANSWER-
the total charge present in the system and surroundings is constant in any process
Two charged particles both have positive net charges. They are near each other
and released from rest. Which of the following statements best describes the
4|Page
RIO SALADO PHYSICS 112 MIDTERM EXAM NEWEST 2025/2026
WITH COMPLETE 100 QUESTIONS AND CORRECT ANSWERS
|ALREADY GRADED A+||BRAND NEW VERSION!
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) - ANSWER-The
speed of the of the particle will remain the same
Which of the following resistors will experience the largest flow rate of charge? All
the resistors have identical resistance - ANSWER-R4
A light bulb connects to a battery. A second, identical light bulb connects in
parallel to the first light bulb. The connecting wires have negligible resistance.
When the switch is closed, the original light bulb will - ANSWER-experience no
change in brightness
What is the direction of the field halfway between two horizontal parallel wires if
the top wire has a current of 4A to the left and the bottom wire has a current of
2A to the right - ANSWER-out of the page
Which of the following correctly ranks the resistors in order from largest voltage
drop across the resistor to smallest voltage drop? All the resistors have identical
resistances - ANSWER-R4>R3>R1=R2
1|Page
, RIO SALADO Physics 112 Midterm Exam
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)
<----------- pipe
positive particle-------> - ANSWER-down
What is the magnitude fo the force on a +3mC charge moving at a speed of
1000m/s through a 1.25T magnetic field - ANSWER-Fm=BvQ
1.25 x 1000 x 3x10^-3
3.75 N
Two parallel wires are horizontally oriented. The top wire has a current of some
value I directed to the left, and the bottom wire has current of 2xI directed to the
right. At what point will the magnetic fields cancel out? - ANSWER-some point
above the wire
A positively charged 2mC particle moving in the upward direction at a speed of
20m/s enters a 3.0T field directed into the page. The particle path curves with a
radius of 6cm. What is the mass of the particle - ANSWER-qvB= mv^2/r
m=qbr/v
m= (2x10^-3) (3T) 0.06)/20
1.8 x10^-5
Which of the following correctly identifies the initial direction of the force on the
moving positively charged particle
OOOO
2|Page
, RIO SALADO Physics 112 Midterm Exam
OOOO
OOOO
OOOO
^
I
I
+ particle - ANSWER-right
What is the direction of the magnetic force on the wire
current directed into the screen - ANSWER-right
what is the magnitude of the force on a 0.5m wire that has 4.0 A of current in a
uniform magnetic field of 2.0T? The wire and the magnitic field are perpendicular
to each other - ANSWER-F=BIL
2x4x0.5
F=4N
Which of the following correctly identifies the initial direction of the force on the
moving negatively charged particle
<--------
<--------
<------ negative particle
<-------
<------- - ANSWER-no force
3|Page
, RIO SALADO Physics 112 Midterm Exam
which of the following statements regarding static electric charge is most accurate
- ANSWER-force is proportional to the inverse square distance between the
charged particles
An object has a positive net charge. The most likely reason for the net charge is
that - ANSWER-electrons were transferred off the object
what is the net charge on an object that has gained 8x10^13 electrons - ANSWER-
8x10 ^13 * 1.6 x10^-19
=-1.3 x10^-5
which of the following processes will not result in a change in net charge on an
object? - ANSWER-polarization
which of the following is an example of an insulation - ANSWER-a piece of paper
a block of wax
a block of glass
all of the above are examples
which of the following statements concerning charge is most accurate - ANSWER-
the total charge present in the system and surroundings is constant in any process
Two charged particles both have positive net charges. They are near each other
and released from rest. Which of the following statements best describes the
4|Page
