#acl Narf:read,write,delete,revert,admin FacultyGroup:read,write All:read == Inductance == ''PIRA classification 5J'' ||<#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.''''' = 5J10. Self Inductance = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| || 5J10.10 || inductor assortment || Sample inductors are shown. || || 5J10.20 || back EMF - light bulb || || || 5J10.20 || back EMF || A 20 Henry inductor energized by a 12 V battery lights a 120 V 7 1/2 W lamp when the circuit is opened. || || 5J10.20 || back EMF || When current is cut off in the primary, a meter in parallel shows an induction current in the primary. || || 5J10.20 || self inductance || Open the switch of a large electromagnet with a lamp in parallel. || || 5J10.20 || inductance spark || Disconnect a 6 V battery from a 2000 turn coil to get a spark, enhance with an iron core. || || 5J10.21 || back EMF || A 4.5 V battery lights a neon bulb when the current to an inductor is disrupted. || || 5J10.22 || neon back EMF || The coils of a electromagnet are connected in parallel with a neon bulb. || || 5J10.23 || neon self induction || A neon lamp across an inductor will glow on one side during charging and will flash on the other when the current is interrupted. || || 5J10.25 || inductance and the wheatstone bridge || The galvanometer in a Wheatstone bridge is connected after an inductor has reach steady state or at the same time the current is started in the inductor. || || 5J10.26 || simulating ideal self-induction || A nulling circuit compensates for the steady state current in a coil. || || 5J10.30 || back EMF - spark || || || 5J10.30 || back emf spark || A one inch spark is produced when the switch of a large electromagnet is opened. || || 5J10.32 || electromagnetic inertia || A spark will jump across an almost closed loop of wire rather than go around when attached to a Leyden jar. || = 5J20. LR Circuits = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| || 5J20.10 || RL time constant on scope || Show the RL time constant on a scope. || || 5J20.10 || LR time constant on scope || The current and voltage of an slow time constant LR circuit are displayed on a dual trace storage oscilloscope. || || 5J20.10 || L/R time constant || A plug in circuit board with a make before break switch for showing slow RL time constants on the oscilloscope. || || 5J20.10 || RL time constant || The RL time constant is shown on a scope. || || 5J20.11 || time constant of an inductive cir. || Compare the time constant of an inductor using different cores on an oscilloscope. || || 5J20.20 || lamps in series or parallel with ind. || Hook light bulbs in series with a large electromagnet. || || 5J20.20 || current in an inductive circuit || Light bulbs across and in series with a large electromagnet show the current in an inductive circuit. || || 5J20.20 || lamps in series and parallel on EM || Two lamps are used to indicate voltage across and current through a large electromagnet. || || 5J20.20 || series lamps on an EM || Light bulbs are hooked up in series with a large electromagnet. || || 5J20.20 || lamps in parallel with solenoid || Apply 110 V to a large solenoid with incandescent and neon lamps in parallel. The neon lamp flashes on the opposite side on discharge. || || 5J20.21 || lights in series and parallel || A circuit with a 5 H inductor has neon lamps in series and in parallel. || || 5J20.25 || inductor characteristics || A bulb in parallel with a coil does not burn when powered by dc, but does when coupled to a high frequency source. || || 5J20.30 || LR time constant || Substitute a inductor and resistor of the same R in a circuit that lights a neon bulb. || = 5J30. RLC Circuits-DC = ||<:10%>'''PIRA #'''||<:>'''Demonstration Name'''||<:60%>'''Abstract'''|| || 5J30.10 || RLC ringing || The voltages across the L and C of a slow RLC circuit are displayed on a dual trace storage oscilloscope while the circuit is energized and de energized. || || 5J30.10 || characteristic times in a parallel || Slow parallel RLC ringing on an oscilloscope. || || 5J30.10 || ringing circuit || Ringing from an RLC circuit is shown on an oscilloscope. || || 5J30.10 || characteristic times in a series RLC || Slow series RLC ringing on an oscilloscope. || || 5J30.10 || RLC ringing || A circuit for showing LC ringing on a oscilloscope. || || 5J30.11 || damped LRC oscillation || Discharge a capacitor through a series LRC circuit. Vary the capacitance and resistance. || || 5J30.15 || RLC ringing || A motor driven commutator switches a circuit from charging to discharging so RLC ringing decay can be observed on an oscilloscope. Picture, Diagram, Construction details in appendix, p.1334. || || 5J30.20 || RLC ringing || A DC circuit with RC charging and RLC discharging. || || 5J30.21 || RLC ringing || A circuit to charge a capacitor either with or without an inductance in series. || || 5J30.30 || singing arc || A ordinary carbon arc is shunted by a series LC circuit. || [[Demonstrations]] [[Instructional|Home]]