Film: "Elementary electricity", sound; 8 min.
• D+55+16
Film: Elementary Electricity Film Title: Elementary Electricity. Level: Upper elementary-Adult. Length: 8 minutes. Black and white. Sound. This film is very simplistic,-perhaps too elementary for college students. It should be viewed before showing it to a class. It is a Navy film, (circa 1950?) Current (coulombs), resistance (ohms), voltage (volts) are all defined. Simple circuits, with batteries in series, resistors, ammeters, and voltmeters are hooked up. Ohm's Law is defined. That's about it.
Related Demos
D+55+5
Conductivity of solution with free ions D+55+0
Resistance boards: Series, parallel, Wheatstone bridge. D+55+2
Watt's law: Variable resistor, glow coil, volt and amp meter. D+55+4
High current melts the fuse wire. D+55+6
Resistance thermometer: Iron coil in liquid Nitrogen and flame varies current. D+55+8
Effect of temperature on current in carbon or tungsten filaments. D+55+10
Large tungsten filament lamp; as it heats, current drops. D+55+12
Oscillator with resistor, capacitor and neon lamp. D+55+13
Same as D+55+12 using speaker for audio tone generation. D+55+14
Same as D+55+12 using oscilloscope to display waveform. D+55+18
Resistor analog: Marbles cascading down pin board. D+55+20
Applet: Battery-Resistor Circuit D+55+22
Applet: Conductivity D+55+24
Applet: Kirchhoff's Rules (Circuit 2) D+55+28
Applet: Circuit Construction Kit (AC+DC), Virtual Lab D+55+30
Applet: Ohm's Law D+55+32
Applet: Resistance at the Molecular Level