# Ppt on van de graaff generator demonstrations

##### 1/17/07184 Lecture 61 PHY 184 Spring 2007 Lecture 6 Title: Gauss’ Law.

not enclose a net charge. There is no net charge on the walls of the cavity 1/17/07184 Lecture 622 Shielding Demonstration  We will demonstrate shielding in two ways  We will place Styrofoam peanuts in a container on a Van de Graaff generator In a metal cup In a plastic cup  We will place a student in a wire cage and try to fry him/

##### Principle of Engineering Heating effect and magnetic effect of current. Electrostatic hazards and electrical safety Electricity Session 4 (2 hours)

generates currrent See flash animation in http://www.bbc.co.uk/schools/gcsebitesi ze/physics/electricity/electromagneticind uctionrev2.shtml http://www.bbc.co.uk/schools/gcsebitesi ze/physics/electricity/electromagneticind uctionrev2.shtml Demonstration/ruler were rubbed and placed together? ++ Van de Graaff generator Provide a large and continuous supply of charge A Charge Pump A Charge Separator How does it work!? Principle of Van de Graaff generator Electrical Safety Electrical Shocks Occur -> People /

##### Charging by Conduction

student stands on an insulating platform and touches a negatively charged Van de Graaff generator. The neutral physics student becomes charged as the result of contact with the Van de Graaff generator. Each of these examples involves contact between a charged object and/ between the objects. Electrical forces are extremely sensitive to distance. These observations are commonly made during demonstrations and lab experiments. Consider a charged plastic golf tube being brought near a collection of paper bits/

##### Engineering Fundamentals Week 5 (3 hours). Events this week Quiz (45 minutes) Electricity and Magnetism Exploration.

field generates currrent See flash animation in http://www.bbc.co.uk/schools/gcsebitesi ze/physics/electricity/electromagneticind uctionrev2.shtml http://www.bbc.co.uk/schools/gcsebitesi ze/physics/electricity/electromagneticind uctionrev2.shtml Demonstration (TY/? --- - - -  What if a balloon and a ruler were rubbed and placed together? ++ Principle of Van de Graaff generator Capacitance (Optional) Capacitor Capacitance – how much charge is created for each Volt. Exploration Use the given circuit in which/

##### Science 9 Unit D Electrical Principles and Technologies.

, indicated by a spark.^ ^Van de Graaff Generators^ ^An electrostatic machine which uses a moving belt to accumulate very high voltages on a hollow metal globe.^ 1929, Physicist Robert J. Van de Graaff Applications for this high voltage generator include driving X-ray tubes,/ the development of the electric battery in 1800 You will make a battery in high school… ^Volta demonstrated that when metals and chemicals come into contact with each other they produced an electrical current.^metals chemicalselectrical/

##### The SI unit of charge is the a. ohm. b. joule. c. coulomb. d. ampere. e. newton. ans: c obj: 32.3 Coulomb’s Law key: unit, charge.

strong electric field. c. like charges repel. d. hair is a good conductor. ans: c obj: 33.7 the van de graaff generator key: hair, generator, charge Which of the following is NOT an electromagnetic wave. a. Sound b Which of the following is NOT an electromagnetic/ increasing ans: a obj: 14.2 circular orbits key: speed, satellite, orbit A singer shattering crystal glass with her voice is a demonstration of a. beats. b. sound refraction. c. an echo. d. interference. e. resonance. ans: e obj: 26.8 resonance/

##### Boundless Lecture Slides Free to share, print, make copies and changes. Get yours at www.boundless.com Available on the Boundless Teaching Platform.

/Magnetic_fluxView on Boundless.com Induction, AC Circuits, and Electrical Technolo... Faradays Apparatus This is Faradays apparatus for demonstrating that a magnetic field can produce a current. A change in the field produced by the top coil / Circuits, and Electrical Technolo... The apparatus used by Faraday included A) an electric generator to convert mechanical energy to electrical energy B) a Van de Graaff generator to accumulate very high amounts of electrical charge C) a galvanometer to detect any /

##### معادلات ماکسول علی عبدالعالی – داود ظریفی امواج الکترومغناطیسی در محیطهای پیچیده.

دوران رنسانس 1663: Otto von Guericke constructs a primitive electrostatic generating (or friction) machine via the triboelectric effect, utilizing a /the other.Pieter van MusschenbroekLeyden (Leiden) jarcapacitor بطری لیدن اولین خازن تاریخ ! CLIPSElectrostaticsLeyden%20JarLeyden%20jars.flv CLIPSElectrostaticsLeyden JarLeyden Jar & Van de Graaff.mp4 CLIPSElectrostaticsCapacitorsDissectible Capacitor./which were to dominate the 19th century. His demonstrations that a changing magnetic field produces an electric/

##### Hutchison-Milione Reality Show Beyond the Physical World or is it! Back to the Future and back!

& melting pieces of firebrick. The temperature of the flame as it contacts these materials reportedly exceeds 10,000 degrees F, demonstrating the versatility of this gas for a number of applications. A process of converting H20 to HHO, producing a gas that /in the New York Sun, July 10, 1934 [Tesla Said, p.108]. The device, which was based upon a large Van de Graaff generator of unique design and a special type of open ended vacuum tube, comprised a system for the acceleration of very small charged metallic/

##### Top 5 Challenges of Teaching Senior Physics. This is a topic that would be best discussed informally. With a cold beverage in your hands. Unfortunately,

Top 5 Challenges of Teaching Senior Physics Physics 11 Other possible areas could include: … … Physics 11 Momentum/Impulse Demonstrations: Various objects to get a “feel” for momentum. Various objects to get a “feel” for momentum. Rubber / vs Potential Difference Use analogy of a gravitational field. Use analogy of a gravitational field. Demo Demo Van de Graaff generator and voltmeter Van de Graaff generator and voltmeter Physics 12 Lenz’s Law Most students find the concept of “oppose the change” difficult./

##### Theater of Electricity By Brooke Wilson. Web Resource This site is only about electricity, there are no pop-ups Actual facts, history, and photos used.

Originally used as a research tool for early atom-smashing and high energy X-ray experiments Later used for instructional purposes and now on public display and used daily for demonstration Van de Graaff Generator Construction Constructed of two textolite columns 6ft in diameter with a 15 foot hollow aluminum sphere at the top http://www.mos.org/sln/to e/VDG_works.mov http://www/

##### ElectrostaticsBasic Definitions 1 Daily phenomena “Charge” plastic materials by friction Experience of electric force and electric charge Repulsive and.

of charging Different ways of charging Charging by extra high tension power (EHT) supply Charging by Van de Graaff generator Charging by sharing Charging by induction and separation Next Slide Charging by induction and earthing process Photo /charge Electric field pattern around a negative charge Next Slide Various electric field patterns Experimental setup to demonstrate electric fields Diagram Photo ElectrostaticsApplications 1 Application of charges Action of a point Lightning conductor and action/

##### Accelerator Physics Introduction Francesca Curbis Lund University/MAX IV laboratory Nordic Particle Accelerator School 2016 Lund University, Sweden August.

Nordic Particle Accelerator School, August 201611 Van de Graaff accelerator Different versions exists which are called e.g. Pelletron, Laddertron and Tandem Accelerator Nordic Particle Accelerator School, August 2016 Van de Graaff generator can reach 2 MV (up to / Ising published a concept for the linear accelerator based on oscillating electromagnetic fields 1928: Rolf Widerøe demonstrated it 14 Time varying electric field ● Static systems have voltage limitation ● Oscillating fields overcome this problem/

##### 1 W02D1 Electric Dipoles and Continuous Charge Distributions.

lines transmit tension Connection between dipole field and constant field “pulls” dipole into alignment 8 Demonstration: Dipole in a Van de Graaff Generator D22 9 Demonstration: Bouncing Balloon Van de Graaf Generator D17 10 Concept Question: Dipole in Non- Uniform Field A dipole sits in a non-/following expressions best describes the electric field at the point P located at the center of the ring? 28 Demonstration Problem: Ring of Charge A ring of radius a is uniformly charged with total charge Q. Find the/

##### 1 ThEC13, October 2013, Geneva, Switzerland Alex C. MUELLER Deputy Director Review of Accelerators for ADS.

are less stringent. CW linear accelerators must be chosen for demonstrators and full scale plants, because of their potentiality, once properly designed, in /can only accelerate charged particles l the energy gain W of a charge q in an electric field generated by a potential V is: W = q V l (typically used unit: electron volt [/Cockcroft&Walton develop a 700kV electrostatic accelerator based on a to 1932 voltage multiplier, Van de Graaff uses a charge conveyor to reach 1.2MV. l 1928 first Linac by Wideroe /

##### Fundamental Forces Physicists have identified four fundamental forces that account for the account all phenomena in the universe.* ForceStrengthDistance.

but the ball will be less then before) EXAMPLES : Van de Graaff The sphere gives the girl a large negative charge. Each/+ + + + + + + + + + Uniform electric field (the one that has constant magnitude and direction is generated between two oppositely charged parallel plates. Edge effect is minimazed when the length is long compared to their separation. Electric field / the electric field lines between two parallel plates.  Now demonstrate that the electric field lines have equal density everywhere between the/

##### Electric Forces and Fields

by the letter e. 12, 13, 14 The Coulomb (C) is the SI unit of charge. Other experiments by Millikan’s time demonstrated that the electron has a charge of –e and the proton has a charge of +e. The value of e (a single electrical / In the case of air, the value is approximately 8.99 x 109 N • m2 / C2. 42 Electric Fields A Van de Graaff generator is an Electrostatic generator which uses a moving belt to accumulate very high electrostatically stable voltages on a hollow metal globe on the top of the stand/

##### Static Electricity “Electrostatics”. “Static”- not moving. Electric charges that can be collected an held in one place –Examples: sparks on carpet, balloon.

is now positively charged. Electrostatics devices –Electroscope: the separation of metal leaves indicates the presence of static charge –Van de Graaff generator: charge is delivered by a rubber belt to a metal dome –Electrophorus a device used to transfer electric / metal covering. The covering shields them from all outside electrical activity. Michael Faraday, 1791-1867 Michael Faraday demonstrated that the electrostatic charge only resides on the exterior of a charged conductor, and exterior charge has no/

##### 1 WW 2 History Club 24 - Aug - 2011 Manhatten Project Timeline.

an element (nitrogen into oxygen). 1930Ernest O. Lawrence builds the first cyclotron in Berkeley. 1931Robert J. Van de Graaff develops the electrostatic generator. 1932James Chadwick discovers the neutron. 1932J. D. Cockroft and E. T. S. Walton first split /organization. February 24, 1941 Glenn T. Seaborgs research group discovers plutonium. March 28, 1941 Seaborgs group demonstrates that plutonium is fissionable. 5 Manhattan Project Timeline May 3, 1941 Seaborg proves plutonium is more fissionable than/

##### Cosmic Rays and High Energy Physics John P. Wefel Department of Physics and Astronomy Louisiana State University Baton Rouge, LA 70803 USA.

generator encouraged by Rutherford 1932 Generator reaches 700 kV and Cockcroft & Walton split lithium atom with only 400 keV protons. They received the Nobel Prize in 1951. High Energy Physics -- The Very Early Years The Cockcroft-Walton pre- accelerator, built in the late 1960s, at the National Accelerator Laboratory in Batavia, Illinois. High Voltage Machines Van de Graaffs/that given by the highest voltage in the system. 1928 Wideröe demonstrates Isings principle with a 1 MHz, 25 kV oscillator to make 50 /

##### Electricity A Basic Understanding.

negative charge on the cloud can cause a charge separation with the neutral ground. These anvil shaped thunder clouds commonly demonstrate this charge separation process. The electrons on the ground disperse away from the cloud leaving a spot on the ground that/to “cling” to the fabric. A little water interupts the charge separation and the hair pulls off more easily. A Van De Graaff generator is a device that collects static charge on a metal sphere. The friction of the rubber band “brushes” electrons to /

##### Conductors & Insulators

Insulators While insulators are not useful for transferring charge, they do serve a critical role in electrostatic experiments and demonstrations. Conductive objects are often mounted upon insulating objects. This arrangement of a conductor on top of an insulator / of excess charge before its affect is noticeable. The affects of excess charge on the body are often demonstrated using a Van de Graaff generator. When a student places their hand upon the static ball, excess charge from the ball is shared with/

##### ELECTRICITY POWERPOINT SLIDESHOW Grade 9 Science ELECTRICAL PRINCIPLES & TECHNOLOGIES Supporting Science Textbook Content while enriching the Learning.

object and the positive protons attract the charged electrons causing a discharge or miniature lightning bolt. STATIC ELECTRICITY Van de Graaff Generators (VDG) These generators build up an excess of static charge using friction. A rubber belt rubs a piece of metal / conductivity and show a peak in the recording device. Voltage - A waterfall is used, as a model, to demonstrate voltage. Water flows when there is a change in the gravitational potential energy (elevation). Electricity will not flow unless there/

##### Conductors & Insulators

Insulators While insulators are not useful for transferring charge, they do serve a critical role in electrostatic experiments and demonstrations. Conductive objects are often mounted upon insulating objects. This arrangement of a conductor on top of an insulator / of excess charge before its affect is noticeable. The affects of excess charge on the body are often demonstrated using a Van de Graaff generator. When a student places their hand upon the static ball, excess charge from the ball is shared with/

##### Status of High Energy Electron Cooling at FNAL’s Recycler Ring XX th Russian Conference on Charged Particle Accelerators September 13 th, 2006 L. Prost,

) scheme XXth Russian Conference on Charged Particle Accelerators L. PROST, et al. 30 Electrostatic generator: the Pelletron (developed by NEC)  ‘Improved’ Van de Graaff generator  Charge carried by a chain (metal cylinders joined by nylon links) instead of a/ milestones are met. XXth Russian Conference on Charged Particle Accelerators L. PROST, et al. 41 Simulation of cooling demonstration  Without cooling -- the momentum distribution remains flat over 0.3% span for 30 minutes  Coasting beam, /

##### Accelerators in Homeland Security William Bertozzi Wilbur Franklin, Alexei Klimenko, Steve Korbly Robert Ledoux, Rustam Niyazov, Dave Swenson Consultants:

Generators Accelerator-based fusion: D-D: ~2.5 MeV 2 H + 2 H → 3 He + n D-T: ~14.1 MeV 3 H + 2 H → 4 He + n Adelphi Technology DD 10 9 n/s DD 10 10 n/s DT 10 14 n/s DU amplifier 60 kW Stripping reactions – example: 9Be(D,n)10B; Controllable energy, Van de Graaff/Accelerator Objectives Passport Systems has received SBIR funding to demonstrate a new type of compact, cost efficient electron accelerator Phase II - Design, build and demonstrate an operational prototype High duty cycle, variable intensity /

##### Science Synergy Science + Fun + Team Spirit Proposal for a partnership between iPraxis and Science Synergy and The Science Synergy Middle School Invitational.

for all students (K-8). Increase student involvement in the Science Synergy Invitational Tournament The Glowing Hot Dog Demonstration Van de Graaff Generator Flame and Lycopodium Power Demonstration Role of Science Teachers Have students view promotion video(s), presentations Sign up class for Science Day Flame Waves Liquid Nitrogen Demonstration Measuring Success Obtaining a substantially large number of participants (~ 5 classes) Students take pre and post Science/

##### Modern Warfare in the 20 th Century The development of weapons research The development of weapons laboratories The emergence of modern science.

energy were in fact equivalent, according to the formula mentioned before. This was demonstrated by Cockcroft and Walton in 1932, experimentally." Nobel Prize 1921 Albert Einstein Example/ related research during WW-II. KWI for Physics in Berlin with van de Graaff Accelerator tower in front Nuclear Reactions and Energy Release a A Frederic/ 1 0 n The following is an example of a predicted fission reactions which generates neutrons besides energy. The two fission products are very radioactive as they have far/

##### Electron cooling of 8 GeV antiprotons at Fermilab’s Recycler: Results and operational implications June 5 th, 2006 L. Prost, Recycler Dpt. personnel Fermi.

were still a problemBUT… … (first) cooling attempt was successful ! Lionel PROST, et al. 18 First e-cooling demonstration – 07/15/05 Lionel PROST, et al. 19 Cooling force – Experimental measurement methods  Two experimental techniques, both /2 MW requires the energy recovery (recirculation) scheme Lionel PROST, et al. 44 Electrostatic generator: the Pelletron (developed by NEC)  ‘Improved’ Van de Graaff generator  Charge carried by a chain (metal cylinders joined by nylon links) instead of a/

##### Self-Assembled Nanoparticle Array for Spintronics and High Frequency Materials DMR-0547036 PI: Hao Zeng We have combined self-assembly with photolithography.

of its students being minorities and living at or below the poverty level. The PI gave a lecture/ demonstration of electric charge and electricity using a Van de Graaff generator. The students were thrilled by the demonstration. A selected group from grade 8 were given a guided tour of the “Physics and Arts” exhibition located/ DMR-0547036 PI: Hao Zeng A poster-sized card from students at Buffalo Native American School 19 Charlyn Meredith demonstrating the making of nanoporous alumina templates in our lab.

##### ELEN 3371 Electromagnetics Fall 2008 1 Lecture 11: Additional Topics Instructor: Dr. Gleb V. Tcheslavski Contact: Office.

power supplies used in railguns are capacitors and compulsators which are slowly charged from other continuous energy sources or using a Van de Graaff generator. The rails need to withstand enormous repulsive forces during shooting, and these forces will tend to push them apart and/. ELEN 3371 Electromagnetics Fall 2008 25 EM weapons: guns Reality The United States Naval Surface Warfare Center Dahlgren Division demonstrated an 8 MJ rail gun firing 3.2 kg projectiles in October 2006 as a prototype of a 64 MJ /

##### Soreq Low energy particle accelerators activities in Israel Dan Berkovits April 10 th 2014 RECFA TAU 1 Soreq.

Research Accelerator Facility (SARAF)  HUJI involvement in CLIC 2 Soreq The 3 MV Van de Graaff Accelerator at the Weizmann Institute TECHNICAL 3 MV p,d, 3 He and 4 /based BNCT Hadasa HUJIM. Srebnik D. Steinberg 1 IRMM-JRCA. Plompen F.-J. Hambsch Generation IV reactors neutron cross section SNRCA. Shor SNRCA. Kreisel L. Weissman Deuterons cross section/Soreq SARAF Phase-I linac status  SARAF Phase-I is the first to demonstrate: 2 mA CW variable energy protons beam Acceleration of ions through HWR SC cavities/

##### A Short Introduction to Particle Physics What do we know? How do we know? What next? “Is there physics beyond the Standard Model?”

(3 quarks or 3 antiquarks) Electrons and neutrinos Gluon, photon, Z boson, and W boson π ±, K ±, J/  etc.p, n,  ,  , etc. Elementary Particles Robert Van de Graaff’s 1 MeV generator was demonstrated in 1929. John Cockcroft and Ernest Walton demonstrate the first man-made nuclear reaction in 1930 using their 0.4 MeV accelerator. In 1932 E.O. Lawrence’s cyclotron achieved energies of 1/

##### COLLEGE PHYSICS Chapter 19 ELECTRIC POTENTIAL AND ELECTRIC FIELD PowerPoint Image Slideshow.

from accelerator experiments (or cosmic rays). (credit: Daderot, Wikimedia Commons) FIGURE 19.7 The voltage of this demonstration Van de Graaff generator is measured between the charged sphere and ground. Earth’s potential is taken to be zero as a reference/ conductor. FIGURE 19.30 FIGURE 19.31 A charged insulating rod such as might be used in a classroom demonstration. FIGURE 19.32 Lesser electric ray (Narcine bancroftii) (credit: National Oceanic and Atmospheric Administration, NOAAs Fisheries Collection/

##### 1 W02D1 Electric Dipoles and Continuous Charge Distributions.

Force and Torque on Dipole Continuous Charge Distributions 4 Nature Likes to Make Dipoles http://youtu.be/EMj10YIjkaY 5 Demonstration: Dipole in a Van de Graaff Generator D22 6 Concept Question: Dipole in Non- Uniform Field A dipole sits in a non-uniform electric field /of the following expressions best describes the electric field at the point P located at the center of the ring? 24 Demonstration Problem: Ring of Charge A ring of radius a is uniformly charged with total charge Q. Find the direction and /

##### (nz089.jpg)

motion of charged particle in electric field: http://www.mhhe.com/physsci/physical/giambattista/electric/electric_fields.html http://www.nhn.ou.edu/~walkup/demonstrations/WebAssignments/ChargedParticles001.htm http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html Today’s agenda: Announcements. Electric field lines/both r=a and r=b. Demo: Professor Tries to Avoid Debilitating Electrical Shock While Demonstrating Van de Graaff Generator http://en.wikipedia.org/wiki/Van_de_Graaff_generator

##### L. Tlustos, CERNUA9 Meeting, Nov. 2009 Overview Medipix.

GEMs (A.Bamberger, M.Titov, Freiburg) or Micromegas (J.Timmermans, NIKHEF) demonstrated the feasibility of such approach GEM L. Tlustos, CERNUA9 Meeting, Nov. 2009/ – 2000s, 4MeV (mean) PE PE + Al Al Uncovered LiF X-ray image of conversion layers Van de Graaff – 1000s, 14MeV PE / PE+Al cluster count ratio: 252Cf: 10.70 ± 0.04 AmBe:/only few issues found L. Tlustos, CERNUA9 Meeting, Nov. 2009 In the pipeline – Next generation of RO systems RelaxD (Nikhef, Panalytical): 4 chip Mars (Canterbury): 6 chip Ruin (/

##### Fabulous Physics Demos, Toys and Then Some.

-Lake- Council-Wood-puzzles- and-toys.pdf Electro-Static Scientific Wand! Scientifically speaking, the FunFlyStick is a compact Van de Graaff generator, capable of creating an electrical field strong enough to keep the included Mylar objects hovering in the air. https://www/.com/2013/08/26/h ow-to-make-the- electric-pickle- experiment/ Alternating Current Demo AC powered neon bulb demonstrates alternating current. Bulb flashes twice each cycle or 120 flashes per second. When at rest, bulb appears to be /

##### The CA Science Frameworks and the “Lesson Study” planning process An Interactive Design Tool.

com/power.htm This link provides information from HowStuffWorks.com. http://www.howstuffworks.com/power.htm How Van de Graaff Generators Work http://www.howstuffworks.com/vdg1.htm This link provides information from HowStuffWorks.com. http://www./courses have no text materials, but instead use hot linked references and provide numerous classroom applications with demonstrations and hands-on activities. Through JASON Academy courses, teachers are discovering new possibilities for bringing standards-/

##### Particle Physics Outreach in Hungary Éva Oláh 1,2, Noémi Béni 3, Gergő Hamar 4, Árpád Horváth 5, Dezső Horváth 3,4, Gábor Jancsó 4, Beáta Jarosievitz 6,7,

It was opened 27 May 2014 by Prof Heuer, D.G of CERN. Hurrah! Z 0   decay is found! Visit at the Van de Graaff Generator of Wigner RCP Group of students at Wigner RCP Happy winners of the quiz Everybody knows the right answer International Particle Physics Masterclass for high-school / own research in an understandable but scientifically rigorous way. The presentations are followed by vivid discussions and experimental demonstrations. From Atoms to Stars Listening to the lecture on the Standard Model.

##### Do NOW (on p 34): Discuss with your elbow buddy - Does this happen to you? does your hair stand up when you take off your hat? do you sometimes get a shock.

pull together. Positive (+) and Positive (+) charges repel or push apart. Negative (-) and Negative (-) charges repel or push apart. Van de Graaff Generator: When the motor is turned on, the lower roller (charger) begins turning the belt. Since the belt is made of /Scotch Tape) Polypropylene Vinyl (PVC) Silicon Teflon Very negative Exit ticket On p. 29:How did the demonstration of the VDG generator help you understand static electricity and the way charge transfers? Give 2 details from your reading and the /

##### Polish Nuclear Physics Network Jerzy Jastrzębski NuPECC in Kraków June 9, 2005.

after inhibition of binding sites F= 860 pN Force histograms before... Warsaw – Van de Graaff electrostatic accelerator Świerk near Warsaw – 30 MeV proton cyclotron Main Large Scale/– Design Study DIRAC – secondary-Beams Task 5: PANDA 4 Feasibility study to demonstrate the physics performance of PANDA INS33 900 EURISOL Specific Support Action Task 5: Safety/to 400 MeV/A 5.High Temperature Nuclear Reactor of IV generation Proposed, European pilot project, collaboration with RAFAEL and France. Production of /

##### You may have come up with a prediction of static electricity.

the cloth? Objects can be charged when electrons move from one object to another by direct contact (conduction). A Van de Graaff generator is a machine that continuously produces a charge on its domed metal surface. If you have your hands on /Static electricity is the buildup of electric charges on an object that are eventually released. Study Jams: Electricity Activities to demonstrate Electric Charges [see resources] Bend Water with Static Electricity or watch the video clip: https://www.youtube.com/watch/

##### Chapter 25 Electric Potential.

Oil-Drop Experiment Robert Millikan measured e, the magnitude of the elementary charge on the electron He also demonstrated the quantized nature of this charge Oil droplets pass through a small hole and are illuminated by a light/19 C This yields conclusive evidence that charge is quantized Use the active figure to conduct a version of the experiment Van de Graaff Generator Charge is delivered continuously to a high-potential electrode by means of a moving belt of insulating material The high-voltage /

##### PHYSICS adapted from http://www.nearingzero.net (nz128)

, in case the link in the above paragraph doesn’t work: http://campus.mst.edu/physics/courses/24/Handouts/Lec_03.ppt Demo: Professor Tries to Avoid Debilitating Electrical Shock While Demonstrating Van de Graaff Generator http://en.wikipedia.org/wiki/Van_de_Graaff_generator

##### Today’s agenda: Announcements. Gauss’ Law Examples. You must be able to use Gauss’ Law to calculate the electric field of a high-symmetry charge distribution.

, in case the link in the above paragraph doesn’t work: http://campus.mst.edu/physics/courses/24/Handouts/Lec_03.ppt Demo: Professor Tries to Avoid Debilitating Electrical Shock While Demonstrating Van de Graaff Generator http://en.wikipedia.org/wiki/Van_de_Graaff_generator

##### Example: calculate the electric field for 0

a point charge. Summary: electric field for 0 r Something to note: is continuous at both r=a and r=b. Demo: Professor Tries to Avoid Debilitating Electrical Shock While Demonstrating Van de Graaff Generator http://en.wikipedia.org/wiki/Van_de_Graaff_generator

##### -Electric Potential due to a Charged Conductor -The Millikan Oil Drop Experiment -Applications of Electrostatics AP Physics C Mrs. Coyle.

Experiment Robert Millikan measured e, the charge of the electron e = 1.60 x 10 -19 C He also demonstrated the quantized nature of this charge Oil-Drop Experiment With no electric field between the plates: The drop reaches terminal / D =qE Solve for q Observed thousands of times and always found e=multiple of 1.6x10 -19 C Van de Graaff Generator Electrostatic Precipitator OnOff Electrostatic Precipitator It removes particulate matter like ashes from combustion gases Corona discharge ionizes particles of air /

##### 110/6/2015 Physics Lecture 3  Electrostatics Electric field (cont.) Conductors in electrostatic equilibrium The oscilloscope Electric flux and Gauss’s.

ice-pail experiment + + + + + + + + + + + + - - - - - - - - - - - + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + Demonstrates that the charge resides on the surface of a conductor. 2010/6/2015 Mini-quiz Question: Suppose a point charge +Q is in empty space. Wearing rubber gloves, we sneak/surface. Occupants touching the inner surface are in no danger. SAFE 2410/6/2015 15.8 The Van De Graaff Generator Read Textbook + Discuss in Lab. 2510/6/2015 15.9 The oscilloscope Changing E field applied /