E&M (5H) - Magnetic Fields and Forces |
E&M (5K) - Electromagnetic Induction |
Inductance
PIRA classification 5J
Grayed Demos are either not available or haven't been built yet. |
5J10. Self Inductance
PIRA # |
Demonstration Name |
Subsets |
Abstract |
5J10.10 |
inductor assortment |
pira500 |
Sample inductors are shown. |
5J10.20 |
back EMF - light bulb |
pira500 |
Open the switch of a large electromagnet with a lamp in parallel. |
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 |
pira1000 |
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
PIRA # |
Demonstration Name |
Subsets |
Abstract |
5J20.10 |
LR time constant on scope |
pira200 |
The current and voltage of an slow time constant LR circuit are displayed on a dual trace storage oscilloscope. |
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 inductor |
pira200 |
Lamps are used to indicate voltage across and current through a large electromagnet. If possible, do this with the iron core in and then removed. |
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
PIRA # |
Demonstration Name |
Subsets |
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. |
5J30.11 |
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. |