| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 5D20.00 | Resistivity and Temperature | | |
| 5D20.10 | wire coil in liquid nitrogen | PIRA 200 | A lamp glows brighter when a series resistance coil is immersed in liquid nitrogen. |
| 5D20.10 | resistance at low temperature | H-103 | A lamp glows brighter when a series resistance coil is immersed in liquid air. |
| 5D20.10 | cooled wire | Disc 17-21 | A copper coil in series with a battery and lamp is immersed in liquid nitrogen. |
| 5D20.11 | resistance at low temperature | H-104 | A "C" battery, 3 V flashlight bulb, and a copper wire coil make a hand held temp coefficient of resistivity apparatus. |
| 5D20.12 | audible temp-dependent resistance | AJP 49(1),88 | The resistor plunged into liquid nitrogen is part of a voltage controlled oscillator that drives a speaker. |
| 5D20.12 | cooling | E-164 | Current is increased in a long U of iron wire until it glows, then half is inserted into a beaker of water. |
| 5D20.14 | superconducting wire | AJP 48(11),940 | Cool
a coil of NbTi wire in a series circuit with a 12 volt car battery and lamp
first in liquid nitrogen, then helium. The voltage across the coil is monitored
and the lamp brightness is observed. |
| 5D20.15 | flame and liquid nitrogen | PIRA 1000 | |
| 5D20.15 | flame and liquid nitrogen | 5D20.15 | Resistance coils are heated and cooled with a test light bulb in series. |
| 5D20.15 | temperature dependence of resistance | Eg-4 | Two sets of bulbs in series with coils, one put in liquid nitrogen and the other in a flame. |
| 5D20.16 | temperature coefficent of resistance | E-166 | Two coils of different material but the same resistance are placed in a Wheatstone bridge and either is heated or cooled. |
| 5D20.20 | iron wire in flame | PIRA 200 | Heat a coil of iron wire in series with a battery and a lamp and the lamp will dim. |
| 5D20.20 | iron wire in a flame | 30-1.4 | A coil of forty turns of iron wire is heated in a flame while connected in series with a light bulb circuit. |
| 5D20.20 | putting the light out by heat | E-165 | A coil of iron wire wound on a porcelain core in series with a lamp and battery is heated until the lamp goes out. |
| 5D20.20 | heated wire | Disc 17-20 | Heat a coil of iron wire in series with a battery and a lamp. |
| 5D20.21 | flame | E-163 | A coil of nickel wire connected to a battery and galvanometer is heated in a flame. |
| 5D20.30 | carbon and tungsten light bulbs | PIRA 500 | |
| 5D20.30 | pos and neg resistance coefficients | Eg-5 | Measure current and resistance at various voltages for a carbon and tungsten bulb. |
| 5D20.30 | carbon and tungsten lamps | Disc 18-09 | Plot current vs. voltage for carbon and tungsten lamps. |
| 5D20.31 | resistance of light bulbs | 5D20.31 | The V/I curves for tungsten and carbon filament lamps are shown on a dual trace storage oscilloscope. |
| 5D20.32 | temperature of incandescent lamps | AJP 53(6),546 | Two
silicon solar cells with interference filters measure the light at different
wavelengths for use in determining the temperature of the filament. |
| 5D20.40 | resistance thermometer | E-169 | Attach No. 14 copper leads to a platinum coil and use with a Wheatstone bridge. |
| 5D20.50 | thermistors | PIRA 1000 | |
| 5D20.50 | thermistors | 40-1.4 | Use a good kit
of commercial thermistors and display the differential negative resistance
of a fast thermistor on a transistor curve tracer. |
| 5D20.50 | thermistor | Disc 16-17 | Show the resistance of a thermistor placed in an ice water bath. |
| 5D20.60 | conduction in glass at high temp | PIRA 500 | |
| 5D20.60 | conduction in glass | 5D20.60 | |
| 5D20.60 | conduction in glass at high temp | AJP 58(1),90 | A simple version of glass conduction using binder clips and window glass. |
| 5D20.60 | conduction in glass at high temp | 30-1.3 | Heat a capillary tube in a Bunsen burner until it is hot enough to sustain a current that maintains a bright glow. |
| 5D20.60 | conduction in glass | E-168 | Heat a
glass tube with a flame until it is hot enough to sustain conduction. Vary
the current by changing the ballast resistance. |
| 5D20.61 | negative temp coeff of resistance | E-167 | A Nerst glower must be heated with a flame until the resistance is low enough to sustain electrical heating. |