Stetson University Triboelectrification Process Quiz please see pdf for for more details 6/4/2020 Quiz: Quiz 1 Quiz 1 Started: Jun 4 at 10am Quiz Instructi

Stetson University Triboelectrification Process Quiz please see pdf for for more details 6/4/2020
Quiz: Quiz 1
Quiz 1
Started: Jun 4 at 10am
Quiz Instructions
This quiz tests on the first three experiments in Lab 2: Electrostatics, Electric Potential and Field
Mapping and Capacitance. It provides the student with a chance to become acquainted with taking a
Canvas quiz, and be better prepared for the final exam in PHY 2092.
Question 1
5 pts
Triboelectrification is the term for
The process by which electrical sparks are created when one pulls an electrical cord out
from a wall outlet.
The process by which a nearby, electrically isolated, charged object causes electrons to
change their position on an uncharged object.
The process by which Native American Tribes learned to make sparks fly from large fires.
The process where two objects become oppositely charged when they are rubbed together
and then separated.
The process by an object at a high electric potential is placed in physical contact with an
object at a lower electric potential.
The process by which electrical sparks are generated when a candle is put in a microwave
oven and the oven is turned ON.
Question 2
5 pts
Two conducting spheres are mounted on electrically insulating supports. The right
side of sphere A is charged
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Quiz: Quiz 1
neutral.
positively.
negatively.
Question 3
5 pts
Select two correct answers. The electric potential at a point some distance from a
long, charged, straight wire is proportional to
the inverse of the distance from the wire to the point.
the square of the inverse of the distance from the wire to the point.
the magnitude of the product of the charge on the wire and the charge at the point.
the square of the distance from the wire to the point.
the magnitude of the charge on the wire.
the magnitude of the charge at the point.
the logarithm of the distance from the wire to the point.
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Quiz: Quiz 1
Two, large, parallel, metal plates are connected to a DC power supply. The plates
are squares. The plate connected to ground is at x = 0 and sits in the y-z plane. The
x-axis runs perpendicular to the plates. The other plate is connected to the positive
terminal of the power supply.
Question 4
5 pts
For the parallel plates mentioned above, the DC power supply is set to 45 Volts and
the plate on the right is at x = 15 cm.
What is the magnitude of the electric field at a point on the x-axis where x = 6.0 cm?
Answer with a number in the format ### in Newtons per Coulombs.
Question 5
5 pts
For the parallel plates mentioned in the previous question, what is the shape of an
electric potential surface for all points in the x-y plane that sit between the plates?
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Quiz: Quiz 1
a curved plane that increases in height as x increases
a flat plane that slopes up as x increases
a flat plane parallel to the x-y plane
a curved, symmetric cone with its peak at the center of the plates
a curved plane that decrases in height as x increases
Question 6
5 pts
Suppose you are to design a circuit made of only capacitors. The design requirement
is the total capacitance must be 7.5 micro-Farads. However, you only have a box of
identical capacitors each with a capacitance of 10 micro-Farads. Write a short
sentence describing how many capacitors you will use and how you will connect
them to each other to meet the design requirement.
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Quiz: Quiz 1
Question 7
5 pts
Two parallel plate capacitors have capacitance’s C1 and C2. Both have air as the
material between the plates. The plates of capacitor 1 are square with an edge
length of b centimeters. The plates of capacitor 2 are also square with an edge
length of 1.8b. The plates of C1 are separated by 0.2 cm. The plates of C2 are
separated by 0.3 cm.
Calculate the ratio C2 / C1. Round your answer to a number in the format #.##
Question 8
5 pts
Two capacitors, both of capacitance 47 micro-Farads, have a manufacturer’s
uncertainty in their value of ± 5%. If you connect both capacitors in parallel, what is
the propagated absolute error in the equivalent capacitance?
Round your answer to a number in the format #.# in micro-Farads.
Question 9
5 pts
Separate from what an electrometer measures, we interpret this measurement as
proportional to an amount of what physical quantity?
voltage
capacitance
charge
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Quiz: Quiz 1
resistance
electrons
current
Question 10
5 pts
Match the physical quantity on the left with the name of its corresponding units (or
equivalent units) on the right.
charge
[ Choose ]
capacitance
[ Choose ]
electric potential
[ Choose ]
electric field
[ Choose ]
electric potential energy
[ Choose ]
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