| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 5B10.00 | Electric Field | | |
| 5B10.10 | hair on end | PIRA 200 | While standing on an insulated stool, charge yourself up with a Van de Graaff generator. |
| 5B10.10 | hair on end | 5B10.10 | While standing on an insulated stool, charge yourself up with a Van de Graaff generator. |
| 5B10.10 | hair on end | E-46 | Stand on an insulated stool and hold on to a terminal of a static machine. Disconnect the condensers. |
| 5B10.13 | pithball plate and flying balls | Ec-4 | Place
a plate with pith ball hanging on strings on an electrostatic generator.
Also place a cup filled with styrofoam balls on an electrostatic generator. |
| 5B10.15 | Van de Graaff streamers | PIRA 500 | |
| 5B10.15 | Van de Graaff streamers | 5B10.15 | Attach ribbon streamers to the top of a Van de Graaff generator. |
| 5B10.15 | Van de Graaff streamers | Ec-3 | A small stand with thin paper strips is placed on an electrostatic generator. |
| 5B10.15 | Van de Graaff with streamers | Disc 17-08 | Show Van de Graaff with paper streamers, then hair on end. |
| 5B10.16 | recoiling tentacles | AJP 42(2),166 | Place the electrostatic plume made out of nylon rope near the other terminal of the Wimshurst machine. |
| 5B10.21 | electric rosin | E-42 | Melt rosin in
a metal ladle and attach to a static machine. When the machine is cranked
and the rosin slowly poured out, jets of rosin follow the electric field. |
| 5B10.22 | electrostatic painting | AJP 46(4),435 | Clip
the can to ground and a metal object to be painted to the Van de Graaff generator.
Point out that the paint goes around to the back too, and it is thickest
on the edges. |
| 5B10.23 | MgO smoke | AJP 34(11),1034 | Fill an unevacuated bell jar with MgO smoke and they will form three dimensional chain-like agglomerates between electrodes. |
| 5B10.23 | orbiting foil | AJP 32(1),xiv | Throw
a triangle of aluminum foil into the field of a Van der Graaff and it comes
to equilibrium mid-air. Give it a half-twist, and it will orbit in a horizontal
circle below the sphere. |
| 5B10.24 | charge motion in an electric field | 29-1.28 | A charged ball on a dry ice puck is launched toward a Van de Graaff generator. The motion is recorded with strobe photography. |
| 5B10.25 | confetti (puffed wheat) | PIRA 200 | Confetti (puffed wheat, styrofoam peanuts) flies off the ball of an electrostatic generator. |
| 5B10.25 | styrofoam peanuts | 5B10.25 | |
| 5B10.25 | confetti on electrostatic generator | Ec-2 | Confetti flies off the ball of an electrostatic generator. |
| 5B10.25 | streamers | 29-1.18 | Fray the end of a nylon clothesline and charge with an electrostatic machine to show repulsion. |
| 5B10.26 | electrified strings | PIRA 1000 | |
| 5B10.26 | eletrified strings | 5B10.26 | A bunch of hanging nylon strings are charged by stroking with cellophane causing repulsion. |
| 5B10.26 | electrified strings | Ea-8 | Charge a mop of insulating strings. |
| 5B10.26 | shooting down charge | Ea-10 | Use the piezoelectric pistol to discharge the electrified strings. |
| 5B10.30 | electric chimes | PIRA 1000 | |
| 5B10.30 | electric chimes | Eb-9 | A ball bounces between charged metal chimes. |
| 5B10.30 | electric chimes | 29-1.13 | Insert a metalized ping-pong ball between two highly charged metal plates. |
| 5B10.30 | electric chimes | E-39 | A small metal ball hangs on a thread between two bells attached to an electrostatic machine. |
| 5B10.30 | electrostatic ping-pong balls | Disc 16-24 | Conductive ping pong balls bounce between horizontal plates charged with a Wimshurst. |
| 5B10.31 | jumping particles | E-43 | Aluminum powder
bounces between two horizontal plates 1 cm apart attached to a static machine.
Metalized pith balls bounce between an electrode at the top of a bell jar
and the plate. |
| 5B10.32 | Van de Graaff chime | AJP 45(8),772 | Toss
a small foil near the charged sphere (see AJP 32(1),xiv - 5B10.33) and then
bring a grounded ball close to show the chime effect. |
| 5B10.33 | electrostatic ping-pong | Ec-6 | A fluffy cotton ball travels back and forth between an electrostatic generator and a lighted cigar. |
| 5B10.35 | electrostatic ping pong | PIRA 500 | |
| 5B10.35 | electrostatic ping pong | 5B10.35 | Bounce a conducting ball hanging between two plates charged with a Wimshurst. |
| 5B10.40 | fuzzy fur field tank | PIRA 500 | |
| 5B10.40 | fuzzy fur field tank | 5B10.40 | "Fur" in mineral oil aligns along field lines from charged electrodes. |
| 5B10.40 | "velveteens" | AJP 32(5),388 | Fine black fiber clippings in castor oil are used to show electric field between electrodes. |
| 5B10.40 | electric fields between electrodes | Eb-1 | Charged electrodes are placed in a tank of mineral oil containing velveteen and the pattern is projected on the overhead. |
| 5B10.40 | fuzzy fur field tank | 29-2.1 | Bits of material suspended in oil align with an applied electric field. Several pole arrangements are shown. |
| 5B10.40 | electric field | Disc 17-10 | A pan on the overhead projector contains particles in a liquid that align with the electric field. |
| 5B10.41 | repelled air bubbles | 29-2.2 | A stream of air bubbles in an oil bath are repelled in the region of an inhomogeneous field. |
| 5B10.42 | epsom salt on plate | E-44 | Sprinkle Epson salt on a glass plate with two aluminum electrodes. Tap to align the crystals. |
| 5B10.43 | ice filament growth | AJP 39(3),350 | An ice filament pattern shows the electrical field configuration. Place a PZT transducer on a block of dry ice. |
| 5B10.50 | mapping force with "electric doublet | E-45 | Two pith balls charged oppositely and hanging from a rod are used to map out the field in the region of charged conductors. |
| 5B10.51 | plotting equipotential lines | 29-3.1 | A method for plotting equipotential lines from electrodes in a pan on water. |
| 5B10.52 | finger on the electrophorus | AJP 30(1),71 | Charge
and electrophorus., then trace a circle on it with your finger and probe
the resulting field with a pith ball on a long thread. |
| 5B10.53 | extent of electric field | E-52 | Hold
an electroscope several feet away from a static machine and observe the electroscope
leaves rise and fall as sparking occurs. |
| 5B10.54 | mapping field potential, voltage | AJP 31(2),xii | A
wire held in the flame of a candle and attached to a grounded electroscope
is held near a Van de Graaff generator. Mount two candles on a insulator
and attach the second to the case of the electroscope to measure voltage. |
| 5B10.54 | mapping potential field | E-57 | A small alcohol lamp attached to an electrostatic voltmeter can be used to map potential fields. |
| 5B10.55 | liquid crystal mapping | AJP 41(12),1314 | An
electrode configuration is painted onto a conducting paper with temperature
sensitive encapsulated liquid crystals. Joule heating causes color changes. |
| 5B10.55 | liquid crystal mapping | AJP 42(12),1075 | An alternate method (to AJP 41(12),1314) of preparing liquid crystal displays of electric fields. |
| 5B10.57 | double brass plate measurement | 29-2.3 | The
field around a large sphere is measured by separating two brass plates and
measuring the charges with a ballistic galvanometer. |
| 5B10.58 | electric field indicator | Ec-7 | A point on the end of a 500 Mohm resistor connects to a neon bulb in parallel with a small capacitor. |
| 5B10.60 | electric fields of currents | AJP 30(1),19 | Current
carrying conductors are made of transparent conducting ink on glass plates.
Sprinkle on grass seeds to demonstrate the electric lines of force inside
and outside the conducting elements. |
| 5B10.61 | electric fields of currents | AJP 38(6),720 | Draw a circuit on glass or mylar with a soft lead scoring pencil. Dust the glass with small fibers while the current is flowing. |
| 5B10.62 | water drop model of charged particle | 29-2.4 | A water drop model demonstrates the motion of a stream of charged particles in an electric field. |
| 5B10.70 | other surfaces | ref. | see 8C20.20,1L20.10 |
| 5B10.70 | rubber sheet field model | PIRA 1000 | |
| 5B10.70 | rubber sheet model for fields | AJP 28(7),644 | Roll balls over a 6'x4' frame with a stretched rubber surface, distorting it with dowels to represent charges. |
| 5B10.70 | model of field potential | E-58 | A sheet of rubber is pushed up and down with dowels to represent positive and negative charges. |
| 5B10.71 | stretched membrane field model | 29-5.1 | A rubber sheet stretched over a large quilting hoop models electric fields. |