University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 6 Spherical Systems
Solution to Lab Quiz Problem 6.1(Flux Through Hoop Normal Perpendicular)
Problem: A hula hoop of radius 1.0m is in a uniform electric eld with magnitude 1.0 102 N . Its normal is C perpendicular to the eld (carefu
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 9 Computing Potential Dierence
Solution to Homework Problem 9.1(Gauss Law for Parallel Planes)
Problem: Two innite parallel planes of xed charge 2 and 3 are held a distance d apart as shown below. A neutral conducting slab of thickne
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 23 Optical Systems
Solution to Homework Problem 23.1(How long to accelerate to light speed?)
Problem: A problem you should have easily been able to do in UPI, but I get asked it all the time when I ask for a good question on electric
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 3 Beginning Electric Fields
Solution to Homework Problem 3.1(Electric Force Between a Van de Graa and a Pith Ball)
Problem: The Van de Graa develops a charge of 1 105 C and a pith ball has charge of 1 109 C. Which of the following de
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 1 Electric Charge and Introduction to Devices
Solution to Homework Problem 1.1(The Law of Conservation of Charge)
Problem: Select the response below that most precisely states the Law of Conservation of Charge. Select One of the Foll
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 4 Adding Electric Fields and Field Maps
Solution to Homework Problem 4.1(Identifying Dipole Fields)
Problem: Given the eld map to the right, the dashed box contains all the charge generating the eld. Is the long range eld that of a m
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 5 Gauss Law
Solution to Homework Problem 5.1(Electric Flux out of Room)
Problem: A golf tube has total charge 0.1C. Compute the total electric ux out of the lab room containing the charged golf tube and no other net charge. Select On
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 2 Simple Electric Devices and Processes
Solution to Homework Problem 2.1(Determine the Sign of Charge Induced on Conducting Spheres in Contact)
Problem: If you bring a negatively charged insulating rod near two neutral metallic spher
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 5 Reasoning with Gauss Law
Solution to Lab Quiz Problem 5.1(Dene Electric Force)
Problem: Select the one of following that is a denition of electric force. Select One of the Following: (a) The work per unit distance of a charged obje
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 3 Electric Force and Devices
Solution to Lab Quiz Problem 3.1(Static Cling)
Problem: Sometimes when clothes are taken out of a dryer they stick together. Select the following response that best explains why. Select One of the Followi
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 4 Electric Field Checkup
Solution to Lab Quiz Problem 4.1(Total Charge From Field Map)
Problem: The eld map below is drawn using four lines per Q. What is the total charge (including sign) of the system? Select One of the Following:
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 2 Electric Charge
Solution to Lab Quiz Problem 2.1(Comparing the Relative Charges of Individual Electrons)
Problem: You are given a bunch of electrons. Electrons have charge e, but what does this mean? Select One of the Following: (a
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 10 Conductors and Dielectrics Quiz
Solution to Lab Quiz Problem 10.1(Compute Bound Charge of Plexiglass)
Problem: A piece of plexiglass ( = 3.2) is placed above an innite plane of charge with charge density = 0.1 C . Compute the boun
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 7 Parallel Plane Checkup
Solution to Lab Quiz Problem 7.1(Compute Electric Field for Parallel Planes of Fixed Charge)
Problem: An innite plane of charge with uniform charge density 1 = 1C/m2 occupies the y z plane through the origin.
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 14 Resistance Network
Solution to Lab Quiz Problem 14.1(Why Kirchhos Loop Equation True?)
Problem: Which of the following laws or principles is true primarily because the total work done on an electric charge around any closed path i
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 18 Adding Magnetic Fields
Solution to Lab Quiz Problem 18.1(RHR example)
Problem: You draw a coordinate system with + pointx ing to the right of the page and + pointing into the page. y In what direction is + for a righthanded coord
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 26 Optical Elements
Solution to Lab Quiz Problem 26.1(Wavelength of Orange Laser)
Problem: Orange light with wavelength 600nm in vacuum is incident on a material with index of refraction 50. Calculate the velocity and frequency of th
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 19 Force and Torque
Solution to Lab Quiz Problem 19.1(Wire Floating in Magnetic Field)
Problem: A long wire carries Ilw = 2.0 103A down the x axis. A wire segment of length 20.0cm with mass 100.0g = 0.1000kg carrying Isw = 100.0A in
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 21 Inductance
Solution to Lab Quiz Problem 21.1(Current Needed to Double the Energy Stored by an Inductor)
Problem: When a current I ows through a given inductor, the inductor can store an energy U . For the same inductor to store an
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 22 RL Circuits
Solution to Lab Quiz Problem 22.1(Eect of a Loop on Another Loop)
Problem: Loops 1 and 2 are parallel. Immediately after the switch is closed, what happens to loop 2? Select One of the Following: (a) Loop 2 is not aect
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 17 Magnitude of Magnetic Field
Solution to Lab Quiz Problem 17.1(Relative Magnitude of Current Elements Placed Around Circle)
Problem: In the gures below, all the current elements, Id, have the same magnitude. Record the label of the
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 15 Conductor in Electric Field
Solution to Lab Quiz Problem 15.1(Time Constant of Human Body)
Problem: Your skin resistance is about 5000 and your capacitance is about 100pF. What is the time constant of your body? Select One of the
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 13 Resistance Networks
Solution to Lab Quiz Problem 13.1(Voltage Across a Device in a Series Circuit Given the Voltage Across the Other Device and the Battery)
Problem: Two devices are connected in a series circuit with a 9V battery.
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 12 Capacitance
Solution to Lab Quiz Problem 12.1(Energy of Earth)
Problem: Modelling the Earth as isolated spherical conductor with radius 6.4 106m and electric eld of 150 N C downward at its surface. Compute the energy stored in the
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 11 Potential Dierence
Solution to Lab Quiz Problem 11.1(Sign of Potential Energy Given Work)
Problem: If an external agent does positive work on a system, what happens to the potential energy of the system. Select One of the Followin
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 20 Faraday
Solution to Lab Quiz Problem 20.1(Which hoop has zero ux?)
Problem: The gures below show the side view of a circular hoop in a uniform electric eld. Which gure below has zero net ux through the hoop? Select One of the Foll
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Lab Quiz 23 Exam III Review
Solution to Lab Quiz Problem 23.1(What is dl?)
Problem: Amperes law states that B d = 0Iencircled
C
What is d? Select One of the Following: (a) A segment of the wire. (b) A vector in the direction of the eld. (cAn
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 22 Optical Elements
Solution to Homework Problem 22.1(Describe Image from Magnication)
Problem: An image has magnication 0.5. Which of the following describes the image? Select One of the Following: (a) enlarged, upright. (b) enlarge
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 21 Light
Solution to Homework Problem 21.1(Wavelength of AM Radio)
Problem: The rock AM station out of Canada that I listened to while growing up in Michigan had a frequency of 1150kHz = 1.15 106 Hz. Calculate the wavelength of the r
University of Arkansas Community College at Batesville
upii2
PHYS 2469

Spring 2010
Solution for Homework 19 RL Circuits
Solution to Homework Problem 19.1(Resistance Given Time Constant)
Problem: A RL circuit has a time constant, , of 40s and an inductance, L, of 3H what is the resistance of the circiut? Select One of the Following: (a)