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== AC Circuits ==
''PIRA classification 5L''
||<#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.'''''

= 5L10. Impedence =
||<10%  style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<style="text-align:center">'''Subsets'''||<60%  style="text-align:center">'''Abstract''' ||
||5L10.10 ||inductive choke || ||Move a core in and out of a coil in series with a light bulb. ||
||5L10.10 ||variable inductance || ||An inductor with an movable iron core is connected in series with a light bulb. ||
||5L10.10 ||inductive reactance || ||Pull a core in and out of a solenoid in series with a 200W lamp, then a 10 W lamp. Try with DC. ||
||5L10.10 ||inductor with lamp on AC || ||Place a large coil in series with a light bulb, then insert an iron core in the coil and the light bulb dims. ||
||5L10.20 ||capacitive impedence || ||A variable capacitor is connected in series with a light bulb. ||
||5L10.30 ||capacitive reactance || ||A circuit to vary R through the value of the capacitive reactance, among other things. ||
||5L10.35 ||capacitive reactance || ||Measure the voltage and phase across each element in a circuit with a 25W lamp in series with a capacitor. ||
||5L10.40 ||skin effect || ||Conductors of different dimensions are connected to lamp indicators in a high frequency circuit. ||
||5L10.41 ||skin effect || ||Stack metal plates between the primary and secondary of a transformer, a bundle of wire is opened up to gain access to any wire for a current measurement. ||
||5L10.50 ||phasemeter || ||Some phasemeter circuits are given suitable for showing current-voltage relationships for reactive elements. ||
||5L10.51 ||I-V curves on a scope || ||A circuit to generate I-V curves of various electrical components. Diagram, Appendix: p. 1337. ||
||5L10.55 ||octopus || ||A simple circuit used by technicians to probe the relationship of current and voltage in a circuit. ||
||5L10.55 ||impedence bridge || ||Complex impedances are plugged into a Wheatstone bridge board. ||


= 5L20. LRC Circuits - AC =
||<10%  style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<style="text-align:center">'''Subsets'''||<60%  style="text-align:center">'''Abstract''' ||
||5L20.10 ||LCR - phase differences || ||Applied voltage, R, L, and C are displayed on a four channel scope while L is changed and the circuit passes through resonance. ||
||5L20.10 ||parallel resonance || ||Transformers permit viewing voltages in all elements of a parallel RLC circuit. ||
||5L20.10 ||phase shift in an LRC circuit || ||The voltages across elements of a RLC circuit are shown as the inductor is varied through resonance. ||
||5L20.10 ||LCR series circuit || ||Isolation transformers permit viewing applied, R, L, and C simultaneously on an oscilloscope as the inductor is varied through resonance. ||
||5L20.11 ||series RLC phase shift on scope || ||Simultaneous display of four traces of the RLC circuit on a single channel scope using a multiplexer. Circuit diagrams are given. ||
||5L20.11 ||RLC phase relationships || ||A circuit allows phase relationships between R and L or C of the Cenco 80375 choke coil and resonance apparatus to be displayed on an oscilloscope. ||
||5L20.12 ||LCR waveforms display || ||The Leybold double wire loop oscillograph is modified to project laser beams showing the current and voltage relationships of a LRC (circuit given) circuit. ||
||5L20.13 ||LCR phase relationships || ||Show the input and output of an RLC circuit on a dual trace oscilloscope. ||
||5L20.14 ||phase shift in fluorescent circuit || ||Among other things, demonstrate the phase shift in a fluorescent lamp circuit. ||
||5L20.14 ||LC op amp interface || ||OP amps placed across the inductor and capacitor have high impedance and do not perturb the system. ||
||5L20.15 ||LCR - phase differences || ||A neon lamp detector shining on a disk rotated by a synchronous motor shows phase differences in a series RLC circuit driven by 110 V AC. ||
||5L20.16 ||LCR vectors on CRO || ||Pulses are generated from an RLC circuit to modulate the Z axis of a CRO. The dots shift as the applied frequency is changed. ||
||5L20.17 ||seconds period LCR || ||Directions for building an underdamped LCR circuit with a period from .5 to 5 seconds. Forced oscillation with a electromechanical generator. ||
||5L20.18 ||driven LRC circuit || ||The voltage and current across the capacitor, inductor, resistor, and supply are shown in succession on an oscilloscope. ||
||5L20.20 ||RLC - resonance || ||A large lamp lights in a 60 Hz 120 V RLC circuit when the L is changed and resonance is achieved. ||
||5L20.20 ||series LRC circuit resonance ||pira200||The light bulb in a RLC circuit glows when the inductor core is moved through resonance. ||
||5L20.20 ||series RLC resonance || ||A 110 VAC lamp, capacitor, and variable inductor form a series circuit. ||
||5L20.20 ||series RLC resonance || ||Short out the capacitor in a RLC circuit with a light bulb resistance. ||
||5L20.21 ||parallel AC resonance || ||A capacitor and variable inductor tuned to resonate in parallel at 60 Hz have series light bulb current indicators. ||
||5L20.21 ||parallel resonance || ||A RLC series resonant circuit with a variable inductor and light bulb indicators. ||
||5L20.22 ||RLC - resonance || ||A variable inductor and capacitor in series with a lamp driven by 110 V AC. Short inductor or capacitor, vary both. ||
||5L20.24 ||resonance at 60 Hertz || ||The product of inductance in henrys and capacitance in microfarads should be 7. ||
||5L20.26 ||LC parallel resonance || ||An LC circuit is driven by coupling a second coil driven by an audio oscillator. Reference: AJP 36(1),x. ||
||5L20.30 ||resonance curves on scope || ||A crude but effective spectrum analyzer circuit for generating and displaying frequency response curves on an oscilloscope ||
||5L20.31 ||RLC resonance plot on scope || ||An x-y plot of the resonance curve is generated by mechanically driving a pot controlling the x axis of the scope by a chain to the tuning knob of the signal generator. Diagram, Picture. ||
||5L20.40 ||coupled RLC circuits || ||Two identical RLC circuits and a driving coil are coupled with a common core. The two are shown to resonate at the same frequency, then when both are operated simultaneously, there are two different frequencies at which resonance occurs. Diagram, Picture. ||
||5L20.41 ||air coupled circuit || ||Two coils are air coupled, one is driven by an audio oscillator and various capacitors are placed across the other coil while the output is monitored on an oscilloscope. ||
||5L20.50 ||high voltage RLC ringing || ||The secondary of a high voltage transformer is shunted across a spark gap, Leyden jars, and an inductor made of several turns of heavy copper all in series. ||
||5L20.51 ||HF RLC resonance || ||A 30 MHz 500W generator is coupled to a loop, light bulb, parallel plate RLC circuit and the capacitance changed to find resonance. Picture. ||


= 5L30. Filters and Rectifiers =
||<10%  style="text-align:center">'''PIRA #''' ||<style="text-align:center">'''Demonstration Name''' ||<style="text-align:center">'''Subsets'''||<60%  style="text-align:center">'''Abstract''' ||
||5L30.10 ||bridge rectifier || ||Plug in diodes on a Wheatstone bridge circuit board are used to demonstrate unrectified, half wave, and full wave rectification. Show on an oscilloscope. ||
||5L30.10 ||bridge rectifier || ||Half and full wave rectification with a plug in Wheatstone bridge board. ||
||5L30.10 ||wheatstone bridge || ||A Wheatstone bridge board with plug in elements. ||
||5L30.10 ||rectifier circuit || ||Diodes in a Wheatstone bridge configuration followed by two low pass filters. ||
||5L30.11 ||bridge rectifier || ||A circuit allows switching between unrectified, half, and full wave rectified configurations. A magnet bob pendulum and pickup coil provide a slow ac signal. ||
||5L30.12 ||diode rectifier || ||Use neon lamps to indicate rectification with a diode rectifier tube. ||
||5L30.14 ||thermionic rectifier || ||Kenotron type thermionic rectifier using a switch to change polarity of dc voltage. ||
||5L30.16 ||very low frequency rectification || ||Rectification can be demonstrated with a rotary potential divider and a vacuum tube in one of the standard circuits. Other stuff too. ||
||5L30.20 ||blinky whirligig || ||A small flashing light on the end of a string is whirled around. ||
||5L30.20 ||blinky whirlygig || ||An improvement on TPT,22(7),448, "AC made visible". ||
||5L30.20 ||blinky whirligig || ||Blinking neon bulb on a cord is swung around in uniform circular motion. ||
||5L30.20 ||blinky whirligig || ||Swing a light bulb around and take a picture of it with a fan strobed Polaroid ||
||5L30.21 ||glow lamp swinger || ||Swing a GE A9A or Chicago Miniature Ne-23 neon glow lamp in a 3 foot radius circle. Use as a persistence of vision demo by holding it still. ||
||5L30.21 ||whirling glow lamp || ||A two watt neon glow lamp is mounted on a hand rotator. ||
||5L30.25 ||AC and DC with starch and iodine || ||Drawing an electrode across a starch/iodine solution gives a solid line with dc and a dashed line with ac. ||
||5L30.30 ||LC low pass filter || ||Ammeters measure the current before and after a LC filter while an audio amplifier detects ac before and after as the frequency is varied. ||
||5L30.31 ||current in an LC circuit || ||Lamps are in series in each branch of an LC circuit to show current distribution as inductance is changed. ||
||5L30.34 ||Fourier zeros LC circuit || ||No energy is deposited in a resonant high Q circuit at f=n/pulse width. Circuit given. ||
||5L30.35 ||mechanical analog of LC filter || ||A string and pulley arrangement provides an analog of a parallel LC filter. Reference: AJP 14(5),318. ||
||5L30.36 ||RLC filter || ||A RLC parallel filter with each component individually switched is used to show the effect of each component on audio frequencies. ||
||5L30.50 ||resonant cavity properties || ||Identical ultrasonic transducers are bonded to opposite parallel faces of a solid medium. One is pulsed with a rf voltage at the transducer resonant frequency and the other is the receiver. The frequency adjusted to a Fabry-Perot resonance. ||
||5L30.70 ||many circuits || ||Nine simple circuits using diodes and transistors covering from rectifiers to a linear sweep generator. ||


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