#acl Narf:read,write,delete,revert,admin FacultyGroup:read,write All:read == DC Circuits == ''PIRA classification 5F'' ||<#dddddd>Grayed Demos are either not available or haven't been built yet || ''''' Please note that these tables have not yet been edited to match the equipment that is available within the UW-Madison lecture demo lab. There maybe many items listed within these tables that we either "can not do" or have available.''''' = 5F10. Ohm's Law = ||<10% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets''' ||<60% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''Abstract''' || ||5F10.05 ||charge density in circuits || ||Two demonstrations: first, an electroscope is used to probe the charge density along a large resistance attached to a 5 KV supply, and second, an example where current is flowing through a resistance with no change in potential. || ||5F10.10 ||Ohm's law || ||Measure current and voltage in a simple circuit. Change the voltage or resistance. || ||5F10.10 ||Ohm's Law ||pira200 ||An ammeter, voltmeter, rheostat, and battery pack are connected to demonstrate Ohm's law. || ||5F10.10 ||Ohm's law || ||A battery, rheostat, and meters in a circuit. || ||5F10.10 ||Ohm's law || ||Measure current and voltage in a simple circuit. || ||5F10.10 ||Ohm's law || ||Place 2, 4, and 6 V across a resistor and measure the current, then graph. || ||5F10.12 ||water analogy circuit || ||A water analogy illustrates voltage drops across a dc circuit. || ||5F10.15 ||water Ohm's law analog || || || ||5F10.15 ||water analog || ||A water analog of Ohm's law. || ||5F10.15 ||IR drop in a wire || ||Clip wires from the terminals of flashlight lamps at various points along a stretched wire carrying 2 - 5 amps. || ||5F10.20 ||potential drop along a wire || ||Lecture galvanometers configured as a voltmeter and ammeter measure current and voltage on several samples of wire of the same length. A slide clip can be used to vary length. || ||5F10.20 ||voltage drop along wire || ||Measure the voltage at six points on a long resistance wire. || ||5F10.25 ||potential drop with Wimshurst || ||A 3 m long wood bar is attached at one end to one terminal of a static machine. The other end can be grounded or insulated. Attach several electroscopes along the bar to show flow of charge and potential drop. || ||5F10.26 ||high voltage Ohm's law || ||Two ends of a dry stick are attached to a static machine. Measure with an electrostatic voltmeter and microammeter. || = 5F15. Power and Energy = 5F15.32 ||<10% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets''' ||<60% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''Abstract''' || ||<#cccccc>5F15.10 ||<#cccccc>electrocalorimeter ||<#cccccc> ||<#cccccc>Determine the power delivered by temperature change in water and compare to that computed from voltage, current, and time. || ||<#cccccc>5F15.11 ||<#cccccc>flow calorimeter ||<#cccccc> ||<#cccccc>Water is heated electrically as it flows through a tube. || ||<#cccccc>5F15.12 ||<#cccccc>heating by current from a static mot ||<#cccccc> ||<#cccccc>The ends of a piece of wood sealed in a glass tube are attached to a static machine. The half watt dissipated heats the air and an attached manometer measures the volume change. || ||<#cccccc>5F15.15 ||<#cccccc>KWH meter and loads ||<#cccccc> ||<#cccccc>Measure the power consumed by an assortment of household appliances. || ||5F15.16 ||Nichrome heating with current || ||Vary the lentgh of a long nichrome wire at a fixed voltage. Show the athe nichome wire glows and heats up faster at shorter lentghs. Also point out that it sags as it heats up. || ||5F15.17 ||heating wires in series || ||Several lengths of different wires of the same length are soldered together in series and a piece of paper is hung from each by soft wax. As current is passed through the wire, the paper falls off at different times. || ||5F15.20 ||hot dog cooker || ||Hook nails to 110V and place them on and then in a hot dog. || ||<#cccccc>5F15.30 ||<#cccccc>fuse with 30v lamp ||<#cccccc> ||<#cccccc> || ||<#cccccc>5F15.31 ||<#cccccc>fuse-wire problem ||<#cccccc> ||<#cccccc>With fuse wires of different diameters connected in parallel, which will burn out first? || ||5F15.32 ||vaporize wire - exploding wire || ||A thin wire or strip of aluminum foil vaporizes when a large capacitor discharges through it. || ||<#cccccc>5F15.33 ||<#cccccc>fuse wire ||<#cccccc> ||<#cccccc>Fuse wire is used with a miniature house circuit. || ||<#cccccc>5F15.34 ||<#cccccc>fuses ||<#cccccc> ||<#cccccc>Fuse wire of different sizes are connected across a heavy copper buss. || ||<#cccccc>5F15.35 ||<#cccccc>fuse with increasing load ||<#cccccc>pira200 ||<#cccccc>A fuse wire will eventually fail when the load on the circuit is increased. || ||<#cccccc>5F15.40 ||<#cccccc>voltage drops in house wires ||<#cccccc> ||<#cccccc>Two resistance wires substituting for house wiring glow when they power a load of lamps and heaters. || ||5F15.45 ||Alternating Copper and Nichrome - I2R losses || ||Alternating Copper and nichrome wires in series show different amounts of heating due to current. The nicrhrome segments glow. 30Vdc at 18 amps || ||5F15.50 ||I2R Loss is 4 Different Wires || ||Thick copper, Thin copper, nicrhrome, and nickel wires of the same length are in series and powered with about 3 to 5 Vdc at 3 amp. A galvanometer is use to show the power loss of each segment. || = 5F20. Circuit Analysis = ||<10% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets''' ||<60% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''Abstract''' || ||5F20.10 ||Kirchoff's voltage law ||pira200 ||Measure the voltages around a three resistor and battery circuit. || ||5F20.13 ||voltage divider || ||A simple series circuit of a battery and two resistors. || ||5F20.15 ||continuity of current || ||Same as Eo-4. || ||5F20.15 ||continuity of current || ||An ammeter can be inserted into any branch of a circuit to show currents in and out of a node. || ||5F20.16 ||conservation of current || ||Measure the currents entering and leaving a node. || ||5F20.20 ||superposition of current || ||Same as Eo-7. || ||5F20.20 ||superposition of currents || ||Measure the current from one battery, a second in another position, and the combination in a circuit. || ||5F20.20 ||superposition || ||Shows a standard superposition circuit. || ||5F20.25 ||reciprocity || ||Shows a standard reciprocity circuit. || ||5F20.30 ||potentiometer || ||A slide wire potentiometer is used with a battery and demonstration galvanometer. || ||5F20.30 ||potentiometer || ||A slide wire potentiometer with a standard cell. || ||5F20.31 ||rheostat as potential divider || ||Contrast the slide wire rheostat when used as a rheostat or potential divider. || ||5F20.32 ||long potentiometer || ||Use a ten foot length of nichrome wire as a slide wire potentiometer. || ||5F20.33 ||rheostat potential divider || ||A rheostat and six volt battery demonstrate a potential divider. || ||5F20.40 ||wheatstone bridge - slide wire || ||The slide wire Wheatstone bridge. || ||5F20.40 ||wheatstone bridge - slide wire || ||Two nichrome wires are stretched across the lecture bench and sliding clips connected to a galvanometer are used to find equal potential points. || ||5F20.41 ||wheatstone bridge - human galvan. || ||Stretch a loop of close line previously soaked in salt solution in a parallelogram and hook the ends to a 110 V line. Touch two points of the same potential without shock. || ||5F20.42 ||wheatstone bridge || ||A demonstration Wheatstone bridge with a built in meter and several plug in resistors. || ||5F20.45 ||lightbulb wheatstone bridge || ||A Wheatstone bridge configuration with lightbulbs for resistors. || ||5F20.45 ||light bulb wheatstone bridge || ||Four light bulbs in a Wheatstone bridge arrangement with light bulb indicator. || ||5F20.45 ||light bulb wheatstone bridge || ||A light bulb Wheatstone bridge using 110 ac. || ||5F20.45 ||wheatstone bridge || ||Four 60 W lamps in a diamond bridge with a 10 W lamp as the indicator. An additional 6 V lamp can be switched in when the circuit is balanced. || ||5F20.45 ||wheatstone bridge || ||Three 110 V lamps and a rheostat make up the diamond of a Wheatstone bridge and a small lamp serves as an indicator. || ||5F20.50 ||series and parallel light bulbs ||pira200 ||A light bulb board with switches allows configuration of several combinations of series and parallel lamps. || ||5F20.50 ||series and parallel light bulbs || ||A light bulb board with switches allows configuration of several combinations. || ||5F20.50 ||parallel and series light bulbs || ||Three similar wattage lamps in series, three in parallel. || ||5F20.50 ||series-parallel circuits || ||A series-parallel circuit with three bulbs and six switches can be connected 14 ways. || ||5F20.50 ||series/parallel light bulbs || ||Three 110 V lamps are wired in series and three are wired in parallel. || ||5F20.51 ||light bulb board - 12 V || ||A board with 12V bulbs and a car battery allow combinations of up to three series or three parallel loads. || ||5F20.55 ||series/parallel resistors || ||Measure the current flowing through a wire resistor with 6 V applied and then series and parallel combinations. || ||5F20.56 ||wire combinations || ||A wire circuit is arranged so a segment of n length can have 1 or n wires in parallel. Drawing. || ||5F20.60 ||equivalent series resistance || ||A series of resistors in a circuit are replaced by a single resistor. || ||5F20.61 ||parallel resistance - integral value || ||A formula for obtaining integral values of resistors in parallel to obtain an integral equivalent resistance. || ||5F20.61 ||equivalent parallel resistance || ||Parallel resistors are replaced by a single resistor in a circuit. || ||5F20.63 ||Thevenin's equivalent resistance || ||A Wheatstone bridge resistance circuit is used to reduce resistor combinations to an equivalent resistance. || ||5F20.64 ||equivalent circuit flasher || ||A neon flasher circuit shows the combination rules for series and parallel combinations of resistance and capacitance by timing light flashes. || ||5F20.71 ||large circuit boards || ||A modular circuit board made for 500 student auditoriums. || ||5F20.72 ||general circuits board || ||A circuit board laid out so meters can be plugged in and readings taken for demonstrations of series-parallel circuits and Kirchhoff's laws. || ||5F20.75 ||three-way switch || ||A large circuit board demonstrates a three way switch. || ||5F20.79 ||one boar, river, six people || ||An electrical circuit for solving the problem of getting across the river. || ||5F20.95 ||equivalent resistance analog comput. || ||Using the equivalent resistance of a circuit as an analog computer for finding the focal length of an optical problem. || = 5F30. RC Circuits = ||<10% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets''' ||<60% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''Abstract''' || ||5F30.10 ||capacitor and light bulb ||pira200 ||A 5600 microfarad capacitor, a light bulb, and a 120 V dc supply in series show a long time constant. || ||5F30.10 ||capacitor and light bulb || ||A 5600 microF capacitor is charged and discharged through 7.5 and 40 W light bulbs. || ||5F30.10 ||long RC time constant || ||A 5600 microF capacitor, a light bulb, and a 120 V dc supply in series show a long time constant where the bulb dims as the capacitor charges. || ||5F30.11 ||light the bulb || ||Charge a capacitor with DC and discharge through a light bulb, try the same thing with AC. || ||5F30.12 ||discharge a capacitor || ||Discharge a capacitor through a resistor. Read the voltage with a meter. || ||5F30.15 ||RC time constant on galvanometer || ||A series RC circuit with a galvanometer. Diagram. || ||5F30.16 ||RC voltage follower || ||Use a voltage follower to isolate the circuit from the display. || ||5F30.20 ||RC time constant on scope || ||A circuit with a slow time constant (.1 - 10 sec.) is charged and discharged and the current and voltage are displayed on a dual trace storage scope. || ||5F30.20 ||RC charging curve || ||Show charging and discharging a RC circuit with a battery on an oscilloscope. || ||5F30.21 ||RC time constant || ||Show the time constant from an RC circuit on an oscilloscope. || ||5F30.21 ||RC time constant || ||A plug in circuit board for showing RC time constants on the oscilloscope. || ||5F30.22 ||time constant of an capacitive cir. || ||The time constant of a RC circuit driven by the calibration signal is shown on an oscilloscope. || ||5F30.28 ||finding R from time constant || ||A circuit to measure high resistances by using an RC charging time. || ||5F30.50 ||series and parallel capacitors || ||Two 2 microF capacitors in series or parallel with a 40 W lamp. || ||5F30.60 ||neon relaxation oscillator || || || ||5F30.60 ||blinking neon bulb || ||A neon bulb in parallel with a capacitor will light periodically as the capacitor charges and discharges. || ||5F30.60 ||RC relaxation oscillator || ||An RC relaxation oscillator has a neon lamp across the capacitor provide a visible discharge. || ||5F30.60 ||RC flasher circuit || ||A neon lamp in parallel with the capacitor in a series RC circuit. || ||5F30.60 ||flashing neon light || ||A battery powered neon light oscillator. || ||5F30.60 ||neon relaxation oscillator || ||A circuit for a neon relaxation oscillation oscillator. Reference: AJP 13(12),415. || ||5F30.60 ||relaxation oscillator || ||An RC neon light relaxation oscillator. || ||5F30.61 ||relaxation siren oscillator || ||A double RC relaxation oscillator with slow and fast periods gives a siren waveform. || ||5F30.68 ||backward and forward waves || ||RC circuits are used to get a wave in neon bulbs that goes from the sink to the source. || ||5F30.71 ||capacitance operated relay || ||References but no information on the circuit. Bring your hand close to a aluminum plate and the relay triggers. || ||5F30.80 ||fun circuit || ||One box has switches that control two lights in another box but only one wire connects the two boxes. || = 5F40. Instruments = ||<10% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''PIRA #''' ||'''Demonstration Name''' ||'''Subsets''' ||<60% style="" & quot; & amp; quot; & amp; amp; quot; & amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; amp; amp; quot;text-align:center& amp; amp; amp; amp; amp; quot; & amp; amp; amp; amp; quot; & amp; amp; amp; quot; & amp; amp; quot; & amp; quot; & quot; " ">'''Abstract''' || ||5F40.10 ||sensitivity and resistance of a galv || ||A circuit for the determination of galvanometric constants. || ||5F40.10 ||sensitivity and resistance of galvan || ||Use external resistors to measure the resistance and sensitivity of a galvanometer. || ||5F40.15 ||voltmeter and electroscope || ||Connect series resistance to a galvanometer to make a voltmeter with low sensitivity and measure several dry batteries in series with both the voltmeter and an electroscope. || ||5F40.20 ||converting a galvanometer to a voltm || ||Knowing the resistance and sensitivity of a galvanometer, add a series resistance and check with a voltage. || ||5F40.20 ||galvanometer as voltmeter and ammete || ||A galvanometer is used with shunt and series resistors. || ||5F40.21 ||loading by a voltmeter || ||Measure the voltage across a high resistance circuit with high and low impedance voltmeters. || ||5F40.25 ||converting a galvanometer to a ammet || ||Knowing the resistance and sensitivity of a galvanometer, add a shunt resistance and measure a current. || ||5F40.30 ||hot wire ammeter || ||A crude hot wire galvanometer. || ||5F40.30 ||hot wire ammeter || ||Diagram of a hot wire ammeter. (E-171). || ||5F40.35 ||iron vane meter || ||Repulsion from induced magnetism in two soft iron bars in a solenoid forms the basis of a heavy current ammeter. || ||5F40.50 ||multimeters || ||A couple multimeters are pictured. || [[Demonstrations]] [[Instructional|Home]]