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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• 13:07, 20 April 2022 Physdemo talk contribs created page File:Motor or Generator.mp4
• 13:07, 20 April 2022 Physdemo talk contribs uploaded File:Motor or Generator.mp4
• 13:07, 20 April 2022 Physdemo talk contribs created page File:Lenzs Law Demo Only.mp4
• 13:07, 20 April 2022 Physdemo talk contribs uploaded File:Lenzs Law Demo Only.mp4
• 13:07, 20 April 2022 Physdemo talk contribs created page File:Lenz's Law Tube with Explanation.mp4
• 13:07, 20 April 2022 Physdemo talk contribs uploaded File:Lenz's Law Tube with Explanation.mp4
• 13:06, 20 April 2022 Physdemo talk contribs created page File:Jumping Speaker.mp4
• 13:06, 20 April 2022 Physdemo talk contribs uploaded File:Jumping Speaker.mp4
• 13:06, 20 April 2022 Physdemo talk contribs created page File:Introduction to Magnets.mp4
• 13:06, 20 April 2022 Physdemo talk contribs uploaded File:Introduction to Magnets.mp4
• 13:06, 20 April 2022 Physdemo talk contribs created page File:Induced Currents.mp4
• 13:06, 20 April 2022 Physdemo talk contribs uploaded File:Induced Currents.mp4
• 13:06, 20 April 2022 Physdemo talk contribs created page File:Induced Current Microphone.mp4
• 13:06, 20 April 2022 Physdemo talk contribs uploaded File:Induced Current Microphone.mp4
• 13:06, 20 April 2022 Physdemo talk contribs created page File:Induced Current Guitar Pickup.mp4
• 13:06, 20 April 2022 Physdemo talk contribs uploaded File:Induced Current Guitar Pickup.mp4
• 13:06, 20 April 2022 Physdemo talk contribs created page File:Human Conductor.mp4
• 13:06, 20 April 2022 Physdemo talk contribs uploaded File:Human Conductor.mp4
• 13:05, 20 April 2022 Physdemo talk contribs created page File:Hand Battery.mp4
• 13:05, 20 April 2022 Physdemo talk contribs uploaded File:Hand Battery.mp4
• 13:05, 20 April 2022 Physdemo talk contribs created page File:Electrostatic Induction.mp4
• 13:05, 20 April 2022 Physdemo talk contribs uploaded File:Electrostatic Induction.mp4
• 13:05, 20 April 2022 Physdemo talk contribs created page File:Electrostatic Attract and Repel.mp4
• 13:05, 20 April 2022 Physdemo talk contribs uploaded File:Electrostatic Attract and Repel.mp4
• 13:05, 20 April 2022 Physdemo talk contribs created page File:Conduction Demo With Special Bulb.mp4
• 13:05, 20 April 2022 Physdemo talk contribs uploaded File:Conduction Demo With Special Bulb.mp4
• 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...")

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