Page E5 Demo Request Submission Form

If you would like to submit a request for demonstrations for a lecture, please fill in your name and the date & time of the lecture. Then, as you browse the listings, simply check the boxes corresponding to the demos you would like. When you are through making selections, return to this area and select the "Submit Form" button. To cancel the current settings and start over or leave, select the "Reset Form" button.

(Note: This form is only for this page. If you make selections on other pages, please be sure to fill out the corresponding form.)

: Name of Professor/Lecturer

: Date of Lecture
: Time of Lecture
: Date of Preview (If a preview is desired)
: Time of Preview (If a preview is desired)

Additional requests, instructions, or comments:

INDEX E5 : CIRCUITS

E5.01 LEMON JUICE

Electrodes stuck in a lemon serve as a simple electrical cell.

E5.02 RESISTANCE VS TEMPERATURE

Wires are heated with a blow torch, and the light bulb in the circuit dims as the wires glow.

E5.03 WHEATSTONE BRIDGE

Uses a Wheatstone Bridge to determine an unknown resistance.

E5.04 MOLTEN CURRENT

Glass bridges the gap in a circuit. As it is heated and softens it becomes conducting, and the light bulb glows.

E5.05 POTENTIAL DIFFERENCES

Various points in a circuit are tested to show that potential will vary.

E5.06 POTENTIAL ALONG A LONG WIRE

A long iron wire serves as the resistance in a circuit. As longer stretches of wire are connected to the voltmeter, the potential reading drops.

E5.09 HOW A GALVANOMETER WORKS

A Spindler and Hoyer model demonstrating the inner workings of a moving coil galvanometer.

E5.10 POTENTIOMETERS

Various types of potentiometers as props.

E5.11 DC GENERATOR

A hand-crank generator lights a bulb.

E5.13 SERIES & PARALLEL CAPACITORS

The effective capacitance of capacitors in series and parallel can be shown by measuring the time constants of the combination in an RC circuit.

E5.15 OHM'S LAW

A simple circuit to show V = IR.

E5.16 SERIES & PARALLEL CIRCUITS

A circuit contains six light bulbs that can be switched in and out of the circuit in series or in parallel.

E5.17 CURRENT VS VOLTAGE IN A RESISTOR

Using a light bulb as a resistor, one displays the relationship of current vs voltage on an oscilloscope.

E5.18 CURRENT & VOLTAGE IN A CAPACITOR

An oscilloscope displays the current and voltage across the capacitor in an RC circuit.

E5.20 SWITCHING PARADOX

A trick circuit contains two lights and two switches seemingly in series, but each switch controls its individual light.

E5.23 POWER DISSIPATION

Uses a resistor to show P = IV.

E5.25 LRC RESONANCE

Hear the resonance of an LRC circuit.

E5.27 SPARK PLUG

Shows a spark plug in action.

E5.28 BACK EMF

A simple circuit illustrating back EMF.

E5.29 LRC RESONANCE - VISUAL

Use oscilloscope to find the resonance point of an LRC circuit.

E5.31 TIME CONSTANT IN AN RC CIRCUIT

A light bulb glows and then dims over about ten seconds as the capacitor charges. When the battery is switched out, the bulb glows and then dims as the capacitor discharges.

E5.32 BATTERY & LIGHT BULB

A simple circuit with a light bulb as the resistance.

E5.33 GENECONS

Two hand generators that can light a bulb. When connected together, one is a generator and the other is a motor.

E5.34 ENERGY BIKE

Pedaling a bicycle to light a rank of bulbs.

E5.35 HARTMAN LRC BOX

An LRC circuit with convenient access points.

E5.37 MARBLES AND NAILS

Marbles rolling down a board of nails serve as model for electrons in a conductor encountering resistance.

Click here to return to the text based index.