Combined display of all available logs of UO Physics Demonstration Catalog. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

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• 12:03, 20 April 2022 Physdemo talk contribs created page EM Radiation: Radio and Tesla Coil (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electromagnetic Radiation|file1=}} A Tesla coil is used to produce EM radiation (noise). A battery operated transistor AM radio is placed at the other end of the room to pick up the noise generated by the coil. '''Location: ''' * Tesla Coil: Drawer 73 * Transistor Radio: Shelf K-4")
• 12:03, 20 April 2022 Physdemo talk contribs created page Crystal Radio (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electromagnetic Radiation|file1=}} A Tesla coil is used to produce EM radiation (noise). A battery operated transistor AM radio is placed at the other end of the room to pick up the noise generated by the coil. '''Location: ''' * Tesla Coil: Drawer 73 * Transistor Radio: Shelf K-4")
• 11:57, 20 April 2022 Physdemo talk contribs created page RC--Light Bulb and Capacitor (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Circuits|file1=}} There are two ways to do this demonstration. One is using a high-voltage power supply of around 120 volts connected to a 10-20 thousand micro-farad capacitor. The power supply is used to charge the capacitor. When the capacitor is fully charged, a light bulb is placed across it. The bulb starts out bright, and then dims. The other way to do this is to use low-voltage light bulbs such as flashlight bulbs...")
• 11:57, 20 April 2022 Physdemo talk contribs created page LRC Series Resonance (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Circuits|file1=LRC Series Resonance.gif}} An inductor, resistor, and capacitor are connected in series. One can either monitor the voltage across the capacitor or the voltage across the resistor as the frequency is varied and resonance is reached. '''Location:''' *")
• 11:56, 20 April 2022 Physdemo talk contribs created page LRC Visual Demo (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Circuits|file1=}} A 200-watt light bulb is in series with a variable inductor and a fixed capacitance. As the inductance is changed, by lowering an iron core, the lightbulb reaches a maximum brightness. '''Location:''' *")
• 11:56, 20 April 2022 Physdemo talk contribs created page LR & RC Phase Relations (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Circuits|file1=LR & RC Phase Relations.gif}} An inductor or a capacitor is in series with a resistor. By switching in the inductor or the capacitor, the change in phase relationships of voltage and current can be observed. '''Location:''' *")
• 11:12, 20 April 2022 Physdemo talk contribs created page Theremin (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Capacitance|file1=Theremin.jpg}} Moving a hand closer to the horizontal bar decreases the amplitude. Moving your hand closer to the vertical antenna will increase the pitch. Volume can be adjusted with the knob on the front of the theremin and on the amplifier. The antenna as a theremin acts as one plate of a parallel plate capacitor, and your hand acts as the second. This demo can also be attached to the flame tube. ''...")
• 11:11, 20 April 2022 Physdemo talk contribs created page Capacitor: Storage of Charge (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Capacitance|file1=}} Two 5000 microfarad capacitors connected and acharged to ~80 Volts. They will hold their charge until discharged with a screwdriver. This produces a spark and a very loud "pop". '''Location: ''' * Drawer 89")
• 11:11, 20 April 2022 Physdemo talk contribs created page Parallel Plate Capacitors 2 (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Capacitance|file1=Parallel Plate Capacitors 2.gif}} Two half circle plates that can be adjusted to change the area of the capacitor. Also available are multiple plate radio tuners of the same design type. '''Location: ''' * Plates: Shelf I-2 * Radio tuners: Drawer 89")
• 11:11, 20 April 2022 Physdemo talk contribs created page Parallel Plate Capacitors (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Capacitance|file1=Parallel Plate Capacitors.gif}} Large (20 cm.) plates mounted to allow any separation distance from 1 to 120 mm. (includes indicator scale). Capacitance from 2.3 to 280 pF. The capacitor is connected to an Electrometer and then charged with a battery. Slowly moving away one of the p lates decreases the capacitance and the voltage measured by the Electrometer will increase. A piece of plexiglass can be u...")
• 11:10, 20 April 2022 Physdemo talk contribs created page Leydon Jars (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Capacitance|file1=Leydon Jars.gif}} Old glass jar with foil on the inside and outside. A very basic and visual capacitor. '''Location: ''' * Shelf I-2 *")
• 11:08, 20 April 2022 Physdemo talk contribs created page Human Conductor Circuit (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=Human Conductor.jpg}} A safety bulb is lit up when a conductive path connects the two leads. Works with upwards of 20 people. Brightness can vary with resistance and quality of contact to double as a good demonstration of resistance as well as conduction. You might also wet your hands and touch the leads to show a sudden decrease in resistance. Inserting a metal rod, a plastic rod, and...")
• 11:08, 20 April 2022 Physdemo talk contribs created page Parallel Circuits: Large Rheostats (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two large rheostats are hooked in parallel with large meters or overhead meters. '''Location: ''' * Rheostats: Drawer 79 * Large meters: Shelf K-2 * Overhead Meters: Drawer 83 * Power Supplies: Shelf K-3") Tag: Visual edit: Switched
• 11:06, 20 April 2022 Physdemo talk contribs moved page Series Circuit:LargeRheostats to Series Circuit: Large Rheostats without leaving a redirect
• 11:06, 20 April 2022 Physdemo talk contribs created page Series Circuit:LargeRheostats (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two large rheostats are hooked in series with large meters or overhead meters. '''Location: ''' * Rheostats: Drawer 79 * Large meters: Shelf K-2 * Overhead Meters: Drawer 83 * Power Supplies: Shelf K-3")
• 11:06, 20 April 2022 Physdemo talk contribs created page Fuse Demo (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Three light bulbs are hooked up in parallel with a piece of nichrome wire as a fuse in series with the bulbs. When the fuse burns up all the bulbs go out. '''Location: ''' * Sockets: Shelf K-2 * Fuse wire: Shelf K-2")
• 11:06, 20 April 2022 Physdemo talk contribs created page Parallel Circuit with Light Bulbs (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two or three light bulbs are hooked in parallel. Unscrewing any one of the light bulbs has no effect on the other ones. Bulbs of different wattage can be used showing the dependance of current and power. '''Location: ''' * Light Bulbs: Drawer 113 * Light Bulb Sockets: Shelf K-2")
• 11:05, 20 April 2022 Physdemo talk contribs created page Series Circuit with Light Bulbs (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two light bulbs are hooked in series. A third light bulb is connected directly to a variac (120v). The two series bulbs are half as bright and when the variac is adjusted to the brightness of the series bulbs it is at 50%. When a 75w bulb and a 25w bulb are connected in series only the 25w bulb lights up because it has a higher resistance and therefore most of the available voltage i...")
• 11:05, 20 April 2022 Physdemo talk contribs created page Current Analogy--water flow (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=Current Analog-water flow.gif}} A large jug filled with water is drained by two tubes. One has a significantly larger diameter than the other. The pressure (analogous to electric potential) is the same for both tubes. The larger diameter tube allows more water to flow (small resistance) than the small diameter tube (large resistance). '''Location: ''' * Large Water Container: Shelf T-2...")
• 11:04, 20 April 2022 Physdemo talk contribs created page Current Analogy--marble and pins (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=Marble and pins analogy.gif}} A marble falls through obstacles. '''Location: ''' * Shelf J-1 *")
• 11:03, 20 April 2022 Physdemo talk contribs created page Current: Transfer of Charge (Visible Resistor) (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=VisibleResistor.gif}} The parallel-plate capacitor is connected to a high-voltage power supply with the electrometer connected in series to monitor the current (10 microamps). A ping-pong ball covered with conductive paint dangles between the two plates. When the power supply is turned on, the ball oscillates between the two plates, transferring charge. The higher the voltage or the clo...")
• 11:03, 20 April 2022 Physdemo talk contribs created page Piezoelectricity (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} A trigger puts pressure on a crystal that produces a high potential causing a spark. '''Location: ''' * Drawer 57 or 82")
• 11:02, 20 April 2022 Physdemo talk contribs created page Thermocouple (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Two different metal wires such as Chromel and Constantan ( Type E) are twisted together at each end. One wire is cut in the middle and a volt meter is placed to measure the potential difference which is produced by sticking each end into a bath of different temperatures such as ice water and boiling water '''Location: ''' * Drawer 57 or 82 *")
• 11:02, 20 April 2022 Physdemo talk contribs created page Lemon Battery (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Zinc plated nails and copper wires are inserted into a lemon and a voltage is produced. Voltage can be measured or five lemon batteries can be hooked in series and connected to a capacitor. Ignite a flash cube with the voltage stored in the capacitor '''Location: ''' * Drawer 69")
• 11:02, 20 April 2022 Physdemo talk contribs created page Electrolysis (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Resistance, EMF, and Current|file1=}} Oxygen and hydrogen are separated from water by applying a voltage across electrodes. Hydrogen can be collected in a test tube and ignited. '''Location: ''' * Shelf T-3")
• 10:59, 20 April 2022 Physdemo talk contribs created page Plasma Ball (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=plasma.jpg}} Plasma ball lights fluorescent bulb through induction. Plasma attracts to anything connected to ground (hands, light bulbs, etc.). '''Location:''' * Plasma Ball: T-0 * Fluorescent Bulbs: I-2")
• 10:58, 20 April 2022 Physdemo talk contribs created page Electric Deflection of Electron Beam (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Electric Deflec of Electron.gif}} The beam from an electron gun can be deflected by the field of two parallel plates. The beam is intercepted by an angled phosphorous coated screen (with grid) which glows to show the path of the beam. '''Location: ''' * Cathode Ray Apparatus: Shelf L-2 * High Voltage Supply: Shelf K-3")
• 10:58, 20 April 2022 Physdemo talk contribs created page Jacob's Ladder (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Jacobs Ladder.gif}} A high voltage transformer has two aluminum rods attached to it. The distance between the rods is tapered narrow at the bottom and wide at the top. Breakdown occurs at the bottom and then the spark rises due to the heated air. A new spark starts at the bottom when previous spark reaches the top. The sparks will ignite a piece of paper placed between the rods for add...")
• 10:57, 20 April 2022 Physdemo talk contribs created page Faraday's Pail (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=}} Demonstrates the distribution and induction of electrostatic charge. A charged object is suspended inside the metal can, the inside of the can charges to the opposite sign and the outside becomes charge with the same sign. The induced charge equals the inducing charge. '''Location: ''' * Shelf I-4")
• 10:57, 20 April 2022 Physdemo talk contribs created page Cone and Plate Conductor (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Cone and Plate Conductor.gif}} Place a charge on the cone or a high voltage between the cone and plate (which are separated by an insulator). Measure the field at various points with Faraday Cage, Electrometer and proof Planes. '''Location:''' * Cone/Plate: Shelf I-4 * Electrometer: Shelf K-3")
• 10:57, 20 April 2022 Physdemo talk contribs created page Gauss's Law, Radio in a Cage (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=}} Demonstrates Gauss's Law. Place a radio inside Faraday Cage and it becomes silent. '''Location: ''' * Cage: Shelf I-4 * Transistor radio: Shelf K-4")
• 10:56, 20 April 2022 Physdemo talk contribs created page Gauss's Law, Faraday's Cage (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potential|file1=Faradays Cage.gif}} Demonstrates Gauss's Law. Voltage difference will be proportional to charge inside. With the use of proof planes one can detect the presence of electric fields and the relative intensity of electric fields.and measure charge and potential. '''Location:''' * Cage & Accessories: Shelf I-4 * Electrometer: Shelf K-3 *")
• 10:54, 20 April 2022 Physdemo talk contribs created page Electrostatic Field Demonstrator (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electric Fields and Potentials|file1=Electrostatic Field.gif}} Variously shaped and spaced conductors are placed in a bath of mineral oil. Grass seed is sprinkled on top of the oil. A high potential from a small Van de Graff generator is placed on the conductors. The field is mapped by the alignment of the grass s eed floating on the oil. Oil Bath tank is placed on an overhead for classroom presentation. Option 2 A self...")
• 10:53, 20 April 2022 Physdemo talk contribs created page Electrostatic Friction Rods (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=}} Friction rods when rubbed become charged. Black plastic rod becomes negatively charged when rubbed with rabbit fur. Clear plexiglass rod becomes positively charged when rubbed with a piece of felt. Location: Friction Rods: Drawer 68 Charging Fur & Felt: Drawer 68")
• 10:51, 20 April 2022 Physdemo talk contribs created page Conservation of Charge (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Faradays Cage.gif}} Faraday Cage is setup. Two proof planes, one having a piece of material on it, are placed in the cage. The cage is grounded to neutralize any charge on or in the cage. The two planes are now rubbed together while in the cage. Take each plane out and notice that one is charged negative, the other positive but when they are both in the cage the net charge is zero. '''Location:'''...")
• 10:50, 20 April 2022 Physdemo talk contribs created page 2 by 4 pull (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Two by Four Pull.gif}} A 2x4 is balanced on a watch glass. An electrostaticly charged rod provides enough force to turn the board. '''Location: ''' * 2x4: Wall next to Shelf A * Watch Glass: Drawer 137 * Friction Rods: Drawer 68 * Charging Fur & Felt: Drawer 68")
• 10:49, 20 April 2022 Physdemo talk contribs created page Whimhurst Machine (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Wimhurst Machine.gif}} Electrostatic induction machine that is able to build up a high quantity of charge and develop a high voltage. Generate sparks jumping a gap of 4 - 5 inches. Two Leyden jars can be hooked in series to obtain a high voltage. '''Location:''' * Shelf O-3")
• 10:49, 20 April 2022 Physdemo talk contribs created page Van de Graff Generator (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Van de Graff Generator.gif}} An excellent producer of electrostatic charge-- produces up to 400,000 volts--with many uses. Attach string to the sphere to show field lines. Styrofoam peanuts or a piece of fur will fly off. A small wire device will spin when placed on or near the sphere. It will light a fluorescent bulb when one end is held near by. An insulating stand is available for causing standing...")
• 10:48, 20 April 2022 Physdemo talk contribs created page Electrophorus Plates (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Electrophorous_plates.gif}} This produces a large supply of static charge by induction. Rub the bottom plastic plate with fur, place the aluminum disk onto the plastic and touch the plate, then remove the plate which is now charged. The last two steps can be repeated a number of times, providing a continual source of static charge. '''Location:''' * I-3")
• 10:47, 20 April 2022 Physdemo talk contribs created page Electroscope for overhead (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Electroscope For Overhead.gif}} This device is also used for a variety of demos to show the presence of electrostatic charge. When a charged rod is brought near the plate the needle will move. Scrape the rod on the plate and it will become charged and the needle will stay deflected. Bring an object of opposite charge and the deflection will decrease. '''Location:''' * Shelf I-3")
• 10:46, 20 April 2022 Physdemo talk contribs created page Pith Balls (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Pith Balls.gif}} Charge up pith balls with friction rods to show like charges repel and opposite charges attract. '''Location:''' * Shelf I-3 & Drawer 62")
• 10:46, 20 April 2022 Physdemo talk contribs created page Electroscope (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Electrostatics|file1=Electroscope.gif}} This device is also used for a variety of demos to show the presence of electrostatic charge. When a charged rod is brought near the plate the needle will move. Scrape the rod on the plate and it will become charged and the needle will stay deflected. Bring an object of opposite charge and the deflection will decrease. '''Location:''' * Shelf I-3") Tag: Visual edit: Switched
• 14:23, 14 April 2022 Physdemo talk contribs created page Radiation Emission (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=}} A half silver, half black can is placed over a light bulb which uniformly heats the can. The radiation sensor registers a higher voltage when it is pointed at the black surface than at the silver, demonstrating that a good absorber of radiation is also a good emitter. '''Location: ''' * Shelf E-4")
• 14:23, 14 April 2022 Physdemo talk contribs created page Thermopile Radiation Sensor (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=thermopile.gif}} A sensor that converts thermal radiation to a voltage. Works best when connected to the Keithly Electrometer. When the sensor is directed at a warm or hot surface a positive voltage is observed. When it is pointed at a cold surface, like a beaker of ic e water, a negative voltage is observed. '''Location: ''' * Drawer 53")
• 14:23, 14 April 2022 Physdemo talk contribs created page Black vs. Silver body Radiation (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Black vs Silver.gif}} The cans are filled with hot water and thermometers are placed inside the cans. The cans sit for 15 minutes or more and the temperature is observed. The temperature of the black can will be lower. Note: The cans should be placed on an insulating surface such as styrofoam. '''Location: ''' * Shelf E-4")
• 14:22, 14 April 2022 Physdemo talk contribs created page Comparative Thermal Conduction (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Comparative Thermal Capacity.jpg|file2=Comparative thermal Capacity Re-waxing.jpg}} SAFETY NOTICE: This demo involves fire and very hot metal so you will need gloves, goggles/safety glasses, and a fire extinguisher. TIE UP lose hair and clothing. Fill the alcohol burner about half way with ethanol and allow the wick a couple minutes to begin soaking up the alcohol. Place the star-shaped rod composed of diffe...")
• 14:20, 14 April 2022 Physdemo talk contribs created page Comparative Heat Capacity (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Comparative Heat.gif}} The three metal specimens are mounted on the suport rod, then immersed in boiling water to insure they come to a uniform temperature. Specimens are then dried off and placed on a flat sheet of wax. The depth to which the metal specimens sink is a measure of the specific heat of each. '''Location: ''' * Wax: Drawer 47 *")
• 14:18, 14 April 2022 Physdemo talk contribs created page Boiling Water in a Paper Cup (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=}} SAFETY NOTICE: This demo involves fire so you will need gloves, goggles/safety glasses, and a fire extinguisher. TIE UP lose hair and clothing. When you connect the rubber tubing make sure to connect it to GAS not AIR. Fill the paper cup COMPLETELY with water. If you do not the top will ignite. Place the water cup in the ring burner but make sure to position the cup so that the seam is placed towards the...")
• 14:17, 14 April 2022 Physdemo talk contribs created page Water Balloons (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=}} A balloon is filled with water. The water balloon is placed over a flame and the balloon will not break since the heat is conducted away. '''Location: ''' * Balloons: Drawer 30")
• 14:17, 14 April 2022 Physdemo talk contribs created page Smoke Stack (Created page with "{{NewDemo|subject=Thermodynamics|topic=Transfer of Heat|file1=Smoke_Stack.gif}} A chamber with two chimneys on top has a candle placed inside it. The heated air flows out of the chimney above the candle, causing air to be drawn into the other chimney. Touch paper generates smoke after itis lit. When held above the cool chimney the smoke makes the convection flow visible. The flow is more visible if the chimnies are illuminated from the side by a projector. '''Location:...")

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