| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 5H40.00 | Force on Current in Wires | | |
| 5H40.10 | parallel wires | PIRA 200 | Long vertical parallel wires attract or repel depending on the current direction. |
| 5H40.10 | parallel wires | 5H40.10 | Long vertical parallel wires attract or repel depending on the current direction. |
| 5H40.10 | force between parallel wires | Ei-1 | Current can be passed parallel or antiparallel in long hanging wires. |
| 5H40.10 | parallel wires | E-148 | Two heavy vertical wires 1 cm apart pass 15 - 20 amps in the same or opposite directions. |
| 5H40.10 | parallel conductors | E-9b | Vertical parallel wires pass 15 amps. |
| 5H40.11 | parallel wires, etc | AJP 31(1),59 | Rectangular
loops of solid wire hang on pivots from two stands. Used together, demonstrate
parallel wires, or one stand alone can be used for wire in a magnetic field
or induced emf. |
| 5H40.12 | parallel wires | 31-1.26 | Parallel wires with one being a loop free to turn in pools of mercury. |
| 5H40.13 | parallel wires ammeter | AJP 45(1),106 | Modification of the Project Physics exp. 36 gives an accuracy of 3%. |
| 5H40.14 | force between parallel wires | Ei-4 | Radial wires (like clock hands) spring apart when current is passed. |
| 5H40.15 | interacting coils | PIRA 200 | Two hanging loops attract or repel depending on current direction. |
| 5H40.15 | parallel wires and loops | E-149 | A
narrow loop formed by hanging a flexible wire opens when current is passed.
Two loops in proximity attract or repel depending on current direction. |
| 5H40.20 | pinch effect simulation | PIRA 500 | |
| 5H40.20 | pinch effect simulation | 5H40.20 | Same as AJP 32(11),xxiv. |
| 5H40.20 | pinch effect simulation | AJP 32(11),xxiv | Six no. 18 wires are connected loosely between two terminals. Pass 20 amps and the bundle is attracted. |
| 5H40.20 | pinch effect | 31-1.27 | Six vertical parallel wires are loosely hung in a circular arrangement. |
| 5H40.20 | pinch wires | Disc 19-13 | Six wires
in parallel attract when current passes through each in the same direction.
Then sets of three wires each have current flowing in opposite directions. |
| 5H40.21 | pinch effect | 31-1.28 | A high voltage capacitor is discharged through a cylinder of aluminum foil strips. |
| 5H40.23 | filament and magnet with AC/DC | PIRA 1000 | |
| 5H40.23 | vibrating lamp filament | E-139 | A tube lamp with a straight filament on AC will vibrate when placed between the poles of a magnet. |
| 5H40.23 | vibrating lamp filament | E-7d | A magnet is brought near carbon filament lamps, one powered by AC, the other by DC. The images are projected. |
| 5H40.23 | AC/DC magnetic contrast | Disc 20-07 | A magnet is brought near a carbon lamp filament powered by DC, then AC. |
| 5H40.24 | AC driven sonometer | E-140 | A sonometer
tuned to resonate at a harmonic of 60 Hz is driven by passing AC through
the wire while between the poles of a magnet. |
| 5H40.25 | dancing spiral | PIRA 1000 | |
| 5H40.25 | dancing spiral | Ei-2 | Current is passed through a limp copper spring dangling in a pool of mercury causing it to dance. |
| 5H40.25 | dancing spring | E-150 | A helix of fine wire hanging vertically into a pool of mercury contracts and breaks contact repeatedly. |
| 5H40.30 | jumping wire | PIRA 200 | A wire is placed in a horseshoe magnet and connected to a battery. The wire jumps out of the magnet. |
| 5H40.30 | magnetic force on a wire | Ei-12 | A wire is placed in a horseshoe magnet and connected to a battery. |
| 5H40.31 | jumping wire | Ei-20 | A large heavy wire clip rests in pools of mercury between the poles of a strong magnet. |
| 5H40.32 | aluminum bar in a magnet | E-132 | An
aluminum bar in a magnet has its ends in mercury. Short the mercury pools
to a storage battery and the aluminum bar hits the ceiling. |
| 5H40.33 | electomagnetic circuit breaker | E-141 | A
wire hangs into a pool of mercury and between the poles of a "U" shaped magnet.
As current is passed through the wire, it deflects out of the mercury and
breaks the circuit. |
| 5H40.34 | lead foil in magnet | E-131 | A strip
of lead foil is supported vertically between the poles of a "U" magnet so
it is free to move a few cm when a few dry cells are connected through a
reversing switch. |
| 5H40.35 | jumping wire coil | PIRA 1000 | |
| 5H40.35 | jumping wire | 5H40.35 | A coil of wire wound around one pole of a horseshoe magnet jumps off when energized. |
| 5H40.35 | jumping wire coil | Disc 20-01 | Run twenty amps through a wire in a horseshoe magnet. |
| 5H40.36 | long wire in field | PIRA 1000 | |
| 5H40.36 | long wire in field | 5H40.36 | |
| 5H40.37 | take apart speaker | PIRA LOCAL | Add abstract in Handbook.FM |
| 5H40.40 | current balance | PIRA 500 | |
| 5H40.40 | current balance | E-138 | An open rectangle
of aluminum wire is balanced between the poles of a "U" magnet until current
is passed through the part perpendicular to the field. |
| 5H40.42 | triangle on a scale in a magnet | 31-1.2 | A triangular loop of wire is hung from a spring scale in the mouth of a electromagnet and the current in the loop is varied. |
| 5H40.43 | improved current balance | AJP 53(12),1213 | Improvements on the Sargent-Welch current balance increasing the range to 20 A. |
| 5H40.43 | modified current balance | AJP 45(6),590 | Add molten Wood's metal contacts to the Sargent Welch current balance. |
| 5H40.43 | current balance | Ei-5 | The Welch current balance. |
| 5H40.44 | current balance | TPT 2(3),128 | Design of a current balance with a rectangular coil on knife edges and stationary windings with parallel conductors. |
| 5H40.46 | Maxwell's rule | E-152 | Demonstrates
an electric circuit that can change shape to include the maximum possible
magnetic flux. A heavy wire connects two metal boats floating in mercury
troughs with electrodes at one end. |
| 5H40.48 | CERN floating wire pulley | AJP 31(1),xiii | Shows
a pulley for the "floating wire" technique of simulating a beam of particles
in magnetic fields. The method can be adapted to measure the radius of curvature
of a wire in a magnetic field. |
| 5H40.50 | Barlow's wheel | PIRA 500 | |
| 5H40.50 | Barlow wheel | Ei-15 | A copper disk
with current flowing from the center to a pool of mercury at the edge rotates
when placed between the poles of a horseshoe magnet. |
| 5H40.50 | Barlow's wheel | 31-1.5 | A potential
is applied from the axle of a wheel to a pool of mercury at the rim while
the wheel is between the poles of a magnet. |
| 5H40.50 | Barlow's wheel | E-136 | Current passes
from the bearings of a copper wheel mounted vertically to a pool of mercury
at the base. A "U" shaped magnet is mounted so the current is perpendicular
to the magnetic field. |
| 5H40.50 | Barlow's wheel | E-7g.1 | A picture of the standard vertical disc in a pool of mercury. |
| 5H40.50 | Barlow's wheel | Disc 20-05 | Current flows radially in a disc mounted between the poles of a magnet. |
| 5H40.52 | Barlow's wheel | 31-1.6 | The copper disk in Barlow's wheel is replaced by a cylindrical Alnico magnet with the field parallel to its axis. |
| 5H40.53 | homopolar motor | AJP 29(9),635 | Variation
of Barlow's wheel. An Alnico disk, magnetized in the direction of the axis,
rotates around the axis when a current is made to flow from the axis to the
rim. |
| 5H40.55 | conducting spiral | AJP 38(11),1273 | A conducting spiral is constructed as a simplified unipolar machine. |
| 5H40.60 | electromagnetic swing | E-133 | Switch the current direction in a wire loop swing mounted above one pole of a vertical bar magnet to build up a pendulum motion. |
| 5H40.61 | magnetic grapevine | E-134 | A very flexible
wire suspended alongside a vertical bar magnet will wrap itself around the
magnet when there is a current in the wire. |
| 5H40.62 | electromagnetic conical pendulum | E-142 | A
vertical wire is suspended loosely from above a vertical solenoid into a
circular trough of mercury. As current is passed through the wire, it rotates
in the trough. |
| 5H40.70 | Ampere's motor | PIRA 1000 | |
| 5H40.70 | Ampere's frame | E-143 | A coil on a reversing switch is placed between the poles of strong magnets. |
| 5H40.70 | Ampere's frame | Disc 20-02 | A magnet is brought near and rotates a large current carrying loop. |
| 5H40.71 | Ampere's motor | 31-1.3 | A copper rod rolls along two electrified rails over ring magnets sandwiched between steel plates. |
| 5H40.71 | Ampere's motor | 31-1.4 | A wheel on
electrified rails over a large vertical field produced by electromagnets
rolls back and forth depending on the current direction. Picture. |
| 5H40.71 | Ampere's motor | E-135 | As the current
is reversed in a rod rolling horizontally on a track between the poles of
a strong magnet, the direction of motion reverses. |