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).

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)

• 13:05, 20 April 2022 Physdemo talk contribs created page File:Capacitor V and C Q Constant Explanation.mp4
• 13:05, 20 April 2022 Physdemo talk contribs uploaded File:Capacitor V and C Q Constant Explanation.mp4
• 13:05, 20 April 2022 Physdemo talk contribs created page File:Capacitor V and C Q Constant Demo Only.mp4
• 13:05, 20 April 2022 Physdemo talk contribs uploaded File:Capacitor V and C Q Constant Demo Only.mp4
• 13:04, 20 April 2022 Physdemo talk contribs created page File:Capacitor Stored Energy.mp4
• 13:04, 20 April 2022 Physdemo talk contribs uploaded File:Capacitor Stored Energy.mp4
• 13:02, 20 April 2022 Physdemo talk contribs created page Capacitor Constants: V, C, and Q (Created page with "{{Video|Capacitor_V_and_C_Q_Constant_Explanation.mp4}}")
• 13:00, 20 April 2022 Physdemo talk contribs created page Category:Electricity and Magnetism (Created blank page)
• 12:58, 20 April 2022 Physdemo talk contribs created page Film Loops -- E&M (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=|file1=}} {| class="wikitable" |- ! Concept of Changing Flux !! Location |- |Electron Microscopy: The Microscope||108 |- |Faraday's Law of Induction||60 |- |Ferromagnetic Domain Wall Motion||91 |- |Meters||58 |- |Motors||59 |- |Skylab: The Earth's Magnetic Field||123 |}") Tag: Visual edit: Switched
• 12:54, 20 April 2022 Physdemo talk contribs created page Speaker as a Microphone (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=speaker microphone.jpg}} Show how a speaker can be used as a microphone by connecting it to the oscilloscope! As shown in the photo, connect the two wires from a speaker to the CH. 1 input on the oscilloscope using a BNC cable. By tapping the speaker with your finger, you can see waveforms similar to the one in the photo. You can also whistle, yell, or sing into the speaker to show the waveform that your...")
• 12:53, 20 April 2022 Physdemo talk contribs created page Metal Detector (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=MetalDetector.GIF}} The metal detector consists of two perpendicular coils; one hooked up to a signal generator and one to an oscilloscope. A sinusoidally varying current is sent through one coil, producing a changing magnetic field. You can adjust the frequency for resonance ( made by the inherent L and C values of the coil 7130hz for this set-up) for maximum signal transfer. The coils are then adjusted...")
• 12:52, 20 April 2022 Physdemo talk contribs created page Transformers--Frequency Dependent (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Transformers - Freq Dependent.gif}} A step up transformer is built as shown. With the function generator putting out a 60 Hz sine wave to simulate commercial power the light bulb lights up easily. As the frequency is reduced the brightness of the bulb also reduces until is eventually goes out altogether. A two channel oscilloscope can also be used to track the relationship between the input and output wa...")
• 12:52, 20 April 2022 Physdemo talk contribs created page Lenz's Law Tubes (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Lenz's Law Tubes.gif}} An aluminum tube with a matching set of cylinders to drop into it. One of these has a magnet within it and takes a very long time to fall through the tube as magnetic fields created within the tube opposes it's motion. '''Location: ''' * Tube: Next to Shelf I * Accessories: Drawer 76")
• 12:51, 20 April 2022 Physdemo talk contribs created page Eddy Current Plates (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Eddy Current Plates.gif}} A copper plate is mounted in such a way that it can swing freely in a plane parallel to the plate. When a magnet is placed in such a way that this plane passes between its poles, eddy currents will be induced in the plate as it passes between the magnetic poles. The result is magnetic braking -- a force arises that opposes the motion of the plate -- and the plate that would othe...")
• 12:48, 20 April 2022 Physdemo talk contribs created page Back EMF (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Backemf.gif}} A current is run through a coil, which in turn is hooked up to an oscilloscope. A 330 ohm resistor is placed between the positive and negative terminals of the coil. With the oscilloscope in storage mode, a sharp negative peak can be seen to coincide with a spark when one of the banana plugs is pulled from the power supply. '''Location: ''' * Coil from transformer: Shelf J-3 * 6/12 Volt Po...")
• 12:48, 20 April 2022 Physdemo talk contribs created page Transformers (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Transformers.gif}} Demonstration transformers made by coupling coils of various turns together with laminated iron bars. Step down or step up transformers can be put together. Meters connected to the primary and secondary measure the voltage. Ratios of voltages are compared to the turns ratio. Results are close. Hysteresis and eddy current losses can be discussed. '''Location: ''' * Coils: Shelf J-3 * T...")
• 12:47, 20 April 2022 Physdemo talk contribs created page Induction Coils (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=induction leds 1.jpg|file2=induction leds 2.jpg}} A large coil connected to a galvanometer. Currents are induced by moving a bar magnet in and out or through the coil. Also available to show this concept is a smaller coil connected to some LEDs. Move the magnet through the coil quickly to make the LEDs light up. '''Location: ''' * Coil Shelf J-3 * Bar Magnet: DR 71 * Galvanometer: DR 83 * Small coil &...")
• 12:46, 20 April 2022 Physdemo talk contribs created page Jumping Rings (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Jumping Rings.gif}} An AC solenoid with a moveable iron core. Turn the current on with the ring around the core to send it flying. There are heavy and light rings available and one which is cut to show the importance of the induced current in the ring. There is also a small coil with a light bulb to show the presence of this current. '''Location: ''' * Solenoid: Shelf J-3 * Accessories: Drawer 74")
• 12:45, 20 April 2022 Physdemo talk contribs created page Induced Currents (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Inductance|file1=Induction Coil.gif}} A linear motor salvaged from an old hard drive is the heart of this demo. Attach a small bulb to the leads of the coil and it will light when the coil is moved up and down in the strong magnetic field. Attach a battery to the leads and the coil will climb out of its holder. Attaching an oscilloscope to the leads shows the direct relation between induced EMF and changing flux -- both...")
• 12:42, 20 April 2022 Physdemo talk contribs created page Magnetic Deflection of Electron Beam (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Magnetic.gif}} The beam from an electron gun can be deflected by the field of a set of Helmholtz coils or by a bar magnet. The beam is intercepted by the phosphor coated sheet (with grid) which glows to show the path of the beam. Click here for a wiring diagram [<-- Broken image, needs replacing]. '''Location: ''' * Shelf L-2 *")
• 12:40, 20 April 2022 Physdemo talk contribs created page E/m tube--circular e-beam (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=em tube-circular e beam.gif}} '''Location: ''' * Tube: Shelf L-2 * Power Supply: Shelf K-3")
• 12:39, 20 April 2022 Physdemo talk contribs created page Generator--Alternator (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Generator--Alternator.gif}} An automobile alternator is driven by hand through a set of pulley's. The magnetic field within the alternator can be self induced or can be induced by an external voltage supply. The output of the alternator is connected to a set of three 12 V light bulbs each of which can be independently turned off or on. As the generator is turned to the point of lighting o...")
• 12:37, 20 April 2022 Physdemo talk contribs created page Motor and Generator--Same Device (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Motor and Gen Same Device.gif}} By turning the bicycle wheel, the generator causes the light to turn on. By then applying 5-V AC to the generator, it becomes a motor which can turn the wheel. Because the generator was not designed for this use it takes a little encouragement to turn the wheel. The wheel must be turned by hand at the right speed (less than one rev. per second) in the clock...")
• 12:23, 20 April 2022 Physdemo talk contribs created page Hall Effect (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=}} Hall effect materials ( Bismuth and Germanium) are available. A hall effect probe (in the form of the MBL Force Probe) is also available. With this probe connected to the computer you can plot the strength of a magnetic field. Sensitive enough to show the earth's magnetic field and demonstrate the field is uniform between a set of Helmholtz Coils. A Thorton hall probe connected to a mi...")
• 12:23, 20 April 2022 Physdemo talk contribs created page Magnetic Field Detector (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=}} '''Location:''' *")
• 12:22, 20 April 2022 Physdemo talk contribs created page Current Balance (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Current Balance.gif}} For precise mass measurement or for showing the interaction of current in parallel wires. Parallel or anti-parallel currents can be set up in the two parallel rods. A laser bouncing off of a mirror onto a wall shows very small movements of the upper rod and magnetic dampening helps to limit oscillation. Click here for wiring diagram [BROKEN IMAGE, needs replacing]....")
• 12:21, 20 April 2022 Physdemo talk contribs created page Flip Coil (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Flip Coil.gif}} For measuring the strength of the earth's magnetic field. A coil is flipped by a spring. An oscilloscope records the current produced. '''Location: ''' * Flip Coil: Shelf J-4 * Oscilloscope: Black Cabinet")
• 12:20, 20 April 2022 Physdemo talk contribs created page Solenoids (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=}} A variety of coils are available. '''Location: ''' * Shelf J-4")
• 12:20, 20 April 2022 Physdemo talk contribs created page Electric Motor (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=}} A variety of motors, from permanent magnet to powered coils, can be used to show the effects of electromagnetic forces. Most of these allow easy viewing of the parts. '''Location: ''' * Shelf J4 * Drawer 75")
• 12:20, 20 April 2022 Physdemo talk contribs created page Torsion Balance (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Torsion Balance.gif}} Use this to show the magnetic field created by a current carrying coil. Mount a permanent horseshoe magnet next to the coil or use solenoids to produce an external field. Apply a small current through the coil and the field of the coil will try to align with the external field but is opposed by the torsion wires supporting the coil. A laser beam bounced off of the mi...")
• 12:19, 20 April 2022 Physdemo talk contribs moved page Electromagnet--nail and battery to Electromagnet: Nail and Battery
• 12:18, 20 April 2022 Physdemo talk contribs created page File:Electromagnet.jpeg
• 12:18, 20 April 2022 Physdemo talk contribs uploaded File:Electromagnet.jpeg
• 12:17, 20 April 2022 Physdemo talk contribs created page Electromagnet--nail and battery (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=electromagnet.jpg}} A very simple electromagnet. Double check settings before turning on. '''Location: ''' * Power supply - K2 * Coil/Magnet - 73 * Nails - J4")
• 12:16, 20 April 2022 Physdemo talk contribs created page Jumping Wire (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Jumping Wire.gif|file2=jumping speaker.gif}} String a wire between the poles of the large magnet and connect the ends to a power supply. Turn on a small current through the wire and it will jump out. Reverse the polarity and the wire will jump into the magnet. Also available as a variation on this concept is the "jumping speaker" demo. There are a couple speakers in drawer 43 that look li...")
• 12:15, 20 April 2022 Physdemo talk contribs created page Field of Magnetic Dipole (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Fields and Forces|file1=Field of Magnetic Dipole.gif}} A small plastic box with metal filings suspended in oil. There is a central cavity to receive a round bar magnet. Shake the box to disperse the filings and insert the magnet. The filings will quickly align to the field. Works on the overhead. '''Location: ''' * Shelf J-4 *")
• 12:13, 20 April 2022 Physdemo talk contribs created page Hysteresis (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Materials|file1=Hysteresis.gif}} This demo is used to show the hysteresis curve of iron in a transformer core by plotting B vs H on an oscilloscope. The magnetic induction B is plotted on the vertical axis and the applied field H on the horizontal. The value of H is obtained by using the voltage across a 1 ohm rheostat in series with the primary coil of the transformer. The secondary winding of the transformer p...")
• 12:12, 20 April 2022 Physdemo talk contribs created page Dip needle (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Materials|file1=Dip Needle.gif}} A magnetic compass mounted in a vertical plane. Displays the angle of inclination of the earth's magnetic field '''Location: ''' * Shelf J-4")
• 12:12, 20 April 2022 Physdemo talk contribs created page Magnets (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Magnetic Materials|file1=}} A variety of magnets are available. '''Location: ''' * Disc and Bar Magnets: Drawer 71 * Horseshoe Magnets: Drawer 72")
• 12:11, 20 April 2022 Physdemo talk contribs created page Superconductor (Created page with "{{NewDemo|subject=Electricity and Magnetism|topic=Superconduction|file1=}} A superconductor is cooled with liquid nitrogen and a small rectangular magnet is placed on it. When the superconductor reaches its critical temperature, and begins to superconduct, the magnet will begin to float above the surface. A video camera can be placed on the floating magnet and the image can be projected so it is more visible. This demo looks especially good when the magnet is made to ro...")
• 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...")

(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)