Lecture Demonstrations Laboratory

Demo Request History

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PHYS 2415 001: General Physics II

• Balloons

  small electroscope

  grounded metal or foil sheet

  bounce fabric softener sheets

  Saran wrap on glass bowl

•  video  - Kinds of Charge and Charging
•  video  - Attraction and Repulsion Between Charged Objects
•  video  - Charging by Induction
• Flash Bulb Coil

• Two small balloons

  Electroscopes

•  video  - Kinds of Charge and Charging
•  video  - Attraction and Repulsion Between Charged Objects
•  video  - Smoke Precipitator

• knitting loop

  sliced basketball or similarly sliced spherical or hemispherical shell.

•  video  - Smoke Precipitator

• Small rotating dipole model pivoted between metal plates charged by whimshurst (sp?) machine

•  video  - Electrostatic Bell
•  video  - Electric Fields

• Dipole model between two aluminum plates with Whimshurst machine

  knitting ring with plastic bag

  hanging pith ball (large)

  styrofoam ball with purple straws pointing out to show 3D field lines

•  video  - Electric Fields

•  video  - Van de Graaff Generator
  (with grounding wand clamped onto stand to show sparks then bring large sewing needle or key nearby to show lightning rod effect)
• Radio in Faraday Cage

• Magnetic Deflection of an Electron Beam Apparatus using charged teflon or lucite rod to deflect electron beam.

•  video  - Van de Graaff Generator

• Capacitor Assortment (Small variable parallel plate capacitor, large and small capacitor sizes, large sized capacitors with low capacitance for high voltage, small sized capacitors with big capacitance for small voltage,....)

  two yellow cylindrical capacitors with one unrolled showing metal and insulating sheets

  parallel aluminum plates for show and tell

•  video  - Capacitor Discharge

• Capacitor assortment (same as on Monday)

  Square metal plates

  1 F capacitor with light bulb and 3 D cell battery pack

•  video  - Capacitor Discharge

• Battery assortment ('D', AA or AAA, Lithium, lead acid...)

  Resistor assortment (small, power, high resistance, low resistance, variable resistors and or potentiometers...)

• Theremin

• Setup similar to Power Loss in Transmission Lines, but using 12V car battery and two light bulbs, one connected to battery using short banana wires and the other connected using long thin speaker wire.

•  video  - Resistance Model
•  video  - Temperature Effects on the Resistance of Copper Wire
• Resistive Heating of Nichrome Wire

• Large vertical circuit breadboard with 'D' Battery, resistor, ammeter and voltmeter to show internal resistance of battery

  Light bulb to break and show filament burn.

•  video  - Circuit Analysis

•  video  - Circuit Analysis
•  video  - RC Circuit w/ Function Generator
  (use the charge/discharge circuit with 2 D-cells, four selectable capacitors (0.47uF to 3.0uF) and two resistors (3k & 6k) with TDS3012C scope - saved two setups for charge/discharge)

• two 10 Mohm resistors in series with 9V battery on large circuit board to show measurement error when using a voltmeter w/ finite internal resistance and the RC circuit w/ 2 D-cell batteries

• Big vertical breadboard with battery and two 10MOhm resistors and voltmeter to demonstrate finite resistance of voltmeter. I want to hang the electromagnet from a hook suspended over the demo bench, and I will hang from it

  Wire shorted across 9V battery or D-cell to deflect compass needle.

• Electromagnet
• Magnet collection
•  video  - Magnetic Fields w/ Iron Filings
•  video  - Magnetic Fields w/ Matrix of Iron Rods
•  video  - Magnetic Fields Associated with Current Carrying Wires 1
•  video  - Solenoid w/ Iron core
•  video  - Force on a Current Carrying Wire in a Magnetic Field

• Wire wrapped around nail as electromagnet powered by D-cells. Electron q/m apparatus to show: electron beam moving in circle, electrons causing fluorescence of gas, and electron motion in helix when electric field is also applied.

•  video  - Magnetic Deflection of an Electron Beam
•  video  - e/m Tube Lorentz Force Demonstrator
•  video  - Galvanometer Movement

• Electron q/m apparatus to show: electron beam moving in circle, electrons causing fluorescence of gas, and electron motion in helix when electric field is also applied. Speakers with removable coils - one attached to 9V or 1.5V batteries, other attached to Walkman. AC synchronous motor driven by function generator and DC amplifier (motor kick starts best for a frequency of ~20 Hz) /Same motor running as DC Motor with split ring commutator.

•  video  - Forces Between Current Carrying Wires
•  video  - Galvanometer Movement

• AC synchronous motor driven by function generator and DC amplifier (motor kick starts best for a frequency of ~20 Hz) /Same motor running as DC Motor with split ring commutator.

•  video  - Forces Between Current Carrying Wires

• Solenoid and toroid models for show and tell

  knitting ring (just a plain ring, nothing across it).

• Toroid and solenoid for show and tell. Array of small compass arrows to show magnetic domains and alignment of domains in strong magnetic field (provided by strong conical magnet)

• Meissner Effect (diamagnetic levitation)
•  video  - Solenoid w/ Iron core
• 1x 2x 4x Coils and Bar Magnet
•  video  - Hanging Ring and Magnet

• Single wire with banana connectors to connect to ammeter and "killer magnet" to demonstrate current flow as magnetic flux through the loop is changed

  small plastic hand-crank generator to power flashlight bulb and/or charge capacitor. old opened hard drive with pick-up coil on translating arm visible

• 1x 2x 4x Coils and Bar Magnet
•  video  - Hanging Ring and Magnet
• Flash Bulb Coil
•  video  - LED Coil
•  video  - Eddy Current Pendulum
  (portable version w/ aluminum stand, copper base )
•  video  - Eddy Current Tube

• Camera not needed for eddy current tube. I will use short tube. Would like to use aluminum pie pan for magnet to fall into. Plastic hand crank generator with light bulb and capacitor. Listen to Walkman through inductive coil (two coils, one connected to Walkman, other to amplified speaker, couple the coils via iron core rod). Shake-powered flashlight.

•  video  - LED Coil
•  video  - Eddy Current Tube
•  video  - Jumping Ring
•  video  - Transformers

• Large magnet with "horns" and switch to show back EMF. LR circuit with switch, D-cells, and oscilloscope LC circuit with switch, D-cells, and oscilloscope 300 Ohm antenna cable for show and tell.

•  video  - Lenz's Law and Eddy Currents

• Cass Sackett filling in for Bob today

• Ringing LC Circuit w/ Battery

• Cass Sackett is filling in for Bob

• FM radio

•  video  - Transverse Waves
•  video  - Series LCR Circuit, Resonance

•  video  - Tuning Fork Beats

• rotating bicycle wheel with chain

  Two transverse wave machines to show waves at interfaces

•  video  - Transverse Waves
•  video  - Standing Waves

• plastic corrugated tube that "whistles" when swung overhead

  "singing" aluminum rods

  Chladni plates

•  video  - Standing Waves
•  video  - Tuning Fork Beats
• Resonant tunning fork

• _singing aluminum rods and corrugated plastic tubes

  _wine glass with a little water and alcohol in it, to make sing when wet finger is rubbed around rim. _doppler buzzer

  bullwhip _tuning fork moving near small rectangular board with handle produces beats due to overlap of direct and doppler shifted reflected sound

•  video  - Tuning Fork Beats

• Bull whip

  Knitting ring with plastic bag

  round electric field plates

• Speed of Light

• Lecher Lines
• Speed of Light
•  video  - Polarization of Light

• Large concave mirror mounted on front lecture bench (by computers) and a small white "screen" (board, poster board, stiff white paper) on which to show image of main projector screen. Note: longer focal length helps - we'll use Schlieren optics mirror mounted on back end of front bench, eye model's light box with "AE" transparency, place black poster board around "AE" to cut down on glare from lit white background

•  video  - Ray Optics Kit
•  video  - Light The Match
•  video  - Polarization of Light
• Polarization by Reflection
• Brewster's angle
• Birefringence

• concave mirror placed on computer bench images illuminated letters onto screen

  Total internal reflection of laser around lucite tube

  fiber optic bundle

  fiber optic coupled walkman

•  video  - Ray Optics Kit
• Confocal Mirrors
• Total Internal Reflection
• Rainbow

• large lucite tube with high power green laser for internal reflection

•  video  - Ray Optics Kit
  (I want the set used with the document camera)
• Total Internal Reflection
• Thin Lenses with Objects
  (would like to have an assortment of lenses, for example, 10cm, 20cm and some negative focal length ones)
• Rainbow
  (I would like the rainbow that is formed by passing the beam from a slide projector through vertical slits onto a vertical prism )

• Large "Magnifying Glass"

•  video  - Ray Optics Kit
  (Document Camera version only )
• Thin Lenses with Objects

•  video  - Interference and Diffraction
•  video  - Newton's Rings
•  video  - Thin Film Interference

•  video  - Interference and Diffraction
• Arago's (Poisson's) Spot
• Razor Edge Diffraction
•  video  - Newton's Rings
•  video  - Thin Film Interference
• Line (discontinuous) Spectra
  ( Is there a way to mount the diffraction grating in front of a camera for easy viewing by the whole class (rather than passing out 100 gratings)?)

• Bloomfield's Tesla Coil

•  video  - Interference and Diffraction
• Arago's (Poisson's) Spot
  (With variable width slit and variable round aperture (as on Wednesday))
• Line (discontinuous) Spectra
  (Viewed on camera with grating taped to camera lens. )