DIDALAB-05-ELECTROSTATIQUE-XP6 ang._01363-DIDALAB

Transcription

Electrostatics,
Magnetism,
Electrochemistry
Electron load
116
ELectromagnetism
117
Transformer training kit
120
Electrochemistry
124
Magnet & compass
127
Electrostatics
130
115
ELECTROSTATICS, MAGNETISM, ELECTROCHEMISTRY
ELECTROSTATICS,
MAGNETISM, ELECTROCHEMISTRY
Electron load
> Experiment of Millikan
The apparatus enables to repeat, in a simplified way, the experiment
of Millikan on the determination of the electron load.
Oil droplets, produced by vaporiser & electrally loaded by friction, are
introduced in one steady electrical field. When observing the the
droplet, the field value is adjusted in order to balance exactly its action
on the load & its weight.
Then, the droplet is perfectly still.
When the electric field is suppressed, the droplet falls down & reaches
rapidly its falling speed limit in the air.
Knowing the speed enables to calculate the droplet weight.
The force carried on the droplet, for known value of the field, is
therefore determined.
The force is proportional to its load.
When repeating several times the experiment, we can see that electric
loads do not vary continuously, but by multiple of “e” which is near to
1,6 x 10-19 Coulombs.
The apparatus includes, fitted on the same stand :
• One plane condenser,
• One display microscope,
• One vaporiser,
• One lighting system.
The assembly is fitted on an adjustable high stand. Weight : 4,7 kg.
Ref. PSD 022 040
> Generator for Millikan experiment
Control desk (Mains power: 220 V) for Millikan experiment, with all
necessary functions for carrying out all measurements:
• Voltage generator (0 to 600 V) for the condenser (voltage digital
display).
• Built-in digital timer (falling time measurement).
• Lighting power (6 V-2,5 Amp. DIN plug).
Ref. PSD 022 060
116
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ELECTROSTATICS, MAGNETISM,
ELECTROCHEMISTRY
Electromagnetism
> Digital teslameter
This instrument enables the accurate measurement of continuous or
alternative magnetic fields & the display of magnetic field vector on
oscilloscope.
Liquid crystal display (2000 points) with field direction indication ( + or
- sign). One inverter enables the selection of Bx or By component.
Both components of the the magnetic field vector are available through
Ø 4 mm safety sockets located on the front panel. The instrument has
one selection button (ranges: 1 & 0.1) on each channel.
Teslameter
Ref. PAM 067 360
Biaxial probe: +/-100mT
Ref. PAM 067 390
> Helmholtz coil on stand
Training accessory for digital Teslameter (Ref. PAM 067 360). Study of flat
coils, coupling of two coils, influence of the gap
between the coils
Two flat coils with variable gap are fitted on one common stand (dimension:
400 x 200mm). One coil is fixed, the other coil can be moved.
The gap between the coils can be measured on graduated scale (250mm
long).
Coil characteristics :
• Enamelled wire Ø 13/10 - 100 turns on 4 layers
• Wiring average diameter : 125 mm
• Coil width : 34 mm
• Output on Ø 4 mm safety socket with polarity in dication Maximum current: 5 Amp.
Ref. PAM 067 370
> Solenoid, diameter : 50 mm
This device enables the study of magnetic induction and the field variation
according to the current & the number of turns.
Dual wiring on 400mm of insulated wire (2 x 200 turns), with Ø 4 mm sockets
at 5, 10, 20, 30, 50, 70 et 100 turns on both sides of the middle.
Maximum use conditions : 6 V - 7 Amp.
Ref. PAM 067 375
www.didalab.fr
117
ELECTROSTATICS,
Electromagnetism
>Wimshurst Apparatus
The most famous of electrostatic instruments. Diameter of the disks: 34 cm.
This apparatus enables the carrying out of various experiments such as: study
& properties of electric sparks - physiological effects of electric sparks - heat
effect of electric sparks - ionizing effect of the flame - load spreading on a
conducting surface - needles properties - electric field strength lines.
• Description : two circular plates rotating vertically in opposite directions. Each
one wearing metal sectors, which four dual-crossed brushes are scrapping on.
Also crossing the disks, two combs recover the electric loads, that are
transmitted to spark gaps, either directly or by the intermediary of two
capacitors. This experiment can be carried out by the mean of one switch.
Distance between the spark gaps can be adjusted, enabling the generation, in
dry atmosphere, beautiful electric sparks, 10cm long! When rotating insulated
wheel crank, both plates rotate. The apparatus is fastened on a stang, insuring
good stability.
• Technical characteristics : dimension of the disks : Ø 340 mm. Dimension of
the stand: 550 x 250 mm. Gross dimensions : 550 x 460 x 255 mm. Weight : 6,5
kg.
Provided with Training Manual.
Ref. PAM 065 015
> Accurate electromagnetic balance
Cotton-type balance for the measurement of magnetic induction &
currents through the Laplace’s Law.
The Plexiglass beam is monted on a steel knife edge. Also equipped
of oil shock absorber. Sensitivity can be adjusted by sliding weight.
Measurement is carried out with marked weights (< 100 mg) or small
chain, with direct reading on gradued disk (mg.). The assembly is
fitted on one stand with keying screws & spirit level.
Balance sensitivity : 1 mg
Length of the current element : 20 mm
Maximum intensity : 10 Amp.
Dimension : 450 x 180 x 380 mm
Weight : 3 kg
Ref. PED 025 650
118
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ELECTROSTATICS,
Electromagnetism
>
HP
electromagnetic balance
Principle :
The “HP” balance enables the study of the influence of a magnet upon a currentcrossed conductor.
Checking of formula F=ki (the force exerted on the coil and therefore, on the loud speaker membrane, is proportional to the current).
Characteristics :
The apparatus is constituted of a loud-speaker with two 60 W coils. Coil impedance: 8
ohms.
Each coil is fuse-protected (1Amp.). Equipped of safety sockets.
A plate, interdependent of the loud-speaker membrane, can receive marked weights.
A motion sensor, 0.01mm sensitivity, is fitted over the plate.
For carrying out experiments, the initial position is marked out by a mobile pointer (see
dial), then the plate is progressively loaded : for each load, the coil crossing current
necessary to make the plate coming back to the initial position, is recorded.
Dimension : About 160 x 200 x 180 mm (L x H x W).
Ref. PAM 067 540
> Simplified cotton balance
The asymmetric beam is constituted of dual side printed circuit board with gilt
protection. The other side is a straight beam with balancing weight, wearing the
pan, which the marked weights are put on.
This beam is pivoting on points, that are also used for the current crossing.
In order to facilitate the adjustment, the beam assembly can be moved along the
bracket. the height of the active strand varies between 180 & 270 mm of the
working plane.
Balance sensitivity: 5 mg
Length of the current element : 29 mm
Average permanent intensit : 7 Amp.
Weight : 1,4 kg
Ref. PED 039 240
> Rotating coil
Generation of one electromagnetic force through one coil rotating inside
magnetic field.
The coil armature contains 2000 turns of copper wire (Ø 0,45 mm R=60).
It is fastened on one rotatingf shaft / crank system.
Coil outputs are connected to two copper rings, which brushes are skimming
onto, ensuring the electric continuity up to 2 sockets..
When rotating the coil in front of a magnetized bar, an alternative electromotive
force is generated.
This is underscored in connecting a median zero micro ammeter to the circuit.
RØf. PED 039 260
www.didalab.fr
119
LECTROSTATICS, MAGNETISM, ELECTROCHEMISTRY
ELECTROSTATICS,
Transformer training kit
> Transformer training kit
This kit includes one oriented-molecules magnetic circuit & one set of various coils & accessories. It enables the experimental
study of transformers. All coils are equipped of Ø 4 mm safety sockets & plastic insulating covers for avoiding any access to
the wiring.
1 magnetic circuit
2 x 250 turns coils
1 pair of poles
1 x 5 turns coil with welding device
1 soft iron component
2 x 500 turns coils
1 tempered steel component
1 x 1000 turns coil
1 x 135 turns low voltage coil
1 hollow coil
PED
PED
PED
PAM
213
213
213
067
730
741
724
590
page
page
page
page
120
121
121
123
PED 213 726
page 121
PED
PED
PED
PED
PAM
page
page
page
page
page
213
213
213
213
067
742
727
743
745
580
121
121
121
121
123
Ref. PED 021 370
> Single phase magnetic circuit
Single phase magnetic circuit, constituted of high permeability sheet metal, section:
43 x 43 mm. It is made of a “U”-shaped part & a removable part that shuts the circuit
(locking device using 2 stirrups with screws). The rectified contact areas reduce losses
at the maximum.
Power: about 200 W
Height : 190 mm - Width : 150 mm
Weight : 7,5 kg
Ref. PED 213 730
120
Tel. + 33 (0)1 30 66 08 88
ELECTROSTATICS,
Transformer in Kit version
> interchangeable coils
Coils equipped of safety sockets & fully protected coil (electrical safety device).
Nber of
turns
Wire diam.
(mm)
Nber of
plugs
Average
R
(ohm)
Self
Ind.
Max.
Cur.
PED 213
741
250
16/10
3
0-125-250
0,6
5 mH
12 A
PED 213
742
500
10/10
3
0-250-500
2,8
18 mH 4,5 A
PED 213
743
1000
8/10
3
0-5001000
8,7
45 mH 2,5 A
PED 213
739
2000
55/100
3
0-10002000
36
300
mH
1,5 A
200
1H
0,6 A
PED 213
738
5000
35/100
PED 213
745
135
22/10
4
0-10003000
5000
5
18-54-3627
20 A
> Pairs of poles
Laminated sheet metal poles, square section on one side, prismatic truncatedshaped section on the other side, in order to concentrate the field. The poles are
fitted by stirrups on circuit PED 213 730.
Side graduation for symmetrical assembly.
Weight : 2.5 kg
Ref. PED 213 724
> Soft iron/ tempered steel components
Enabling the construction of a straight electromagnet.
Provided with insulating wedges for coil adaptation.
The soft iron component has a “D” mark.
The tempered steel component has a “T” mark.
Dimension : 150 x 24 x 24 mm. Weight : 850 g
Soft iron
Ref. PED 213 726
Tempered steel
Ref. PED 213 727
Set of wedges
Ref. PED 213 728
www.didalab.fr
121
ELECTROSTATICS,
Electromagnetism
> Field action on current
The apparatus shows the motion of a conductor through magnetic field.
A rigid pendulum is located inside a magnet air-gap, which free end skims
against a brush.
Chromium-plated brass bracket.
Weight : 0.6 kg
Ref. PED 025 500
> Rails for Laplace s Law
Motion of a conductor crossed by a current inside magnetic field. Current
generation inside a conductor moving along non-uniform magnetic field.
It is constituted of of two cvonducting rails fitted between two plates & one brass
mobile conductor.
It must be completed by one or two “U”-shaped magnets.
The apparatus can be displayed with a light source.
Requested current : 2 / 3 Amp.
Ref. PED 039 201
> Barlow s wheel
The electromagnetic force, generated by the action of a permanent magnet on the
current crossing radially the wheel, starts up the wheel rotation.
PVC stand. The current crossing is ensured by one soft brushes system.
Ferrite strong magnet.
Red copper disk, Ø : 155 mm
Weight: 0.9 kg
Ref. PED 025 520
> Electromagnetism law
Joined together into the same apparatus :
• One Barlow’s wheel.
• One Laplace’s rail.
• Field action on a current.
Ref. PED 025 570
122
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ELECTROSTATICS,
Transformer assembling unit
> Straight component
Laminated sheet metal. Core shaped, to be used with coils.
This core has, at one end, one slot for enabling the Frager turn adaptation.
Weight : 2.2 kg
Ref. PED 213 722
> Eddy current kit
This accessory underscores the braking generated by the inducted Eddy current.
The kit includes : one aluminium pendulum: - 200 x 70 mm - (with slots), one
aluminium solid disk, Ø 106 mm, & one fastening device for the magnetic circuit.
Ref. PAM 067 690
> 5 turns coil
Study of spot welding :
5 turns copper wire coil with pliers to be used with magnetic circuit & 1000 or
500 turns coil.
Enabling spot welding of two steel sheets up to 0.2mm thick.
Ref. PAM 067 590
> Melting ring (lead & tin).
Study of induction oven principle. Red copper hollow turn with insulating handle to
be used with magnetic circuit & coil, 1000 or 500 turns.
Ref. PAM 067 580
www.didalab.fr
123
ELECTROSTATICS,
Electrochemistry
> Electrochemistry training unit
Intended to be used for the study of electrolysis, principle of cells,
batteries, metal electrochemical classification, etc.
The unit includes one bar with fastening device :
• 2 electrode-holders for plates or cylindrical rods.
• 1 set of cylindrical electrodes.
• 1 set of 6 plates.
Gap, parallelism, immersion depth can be easily adjusted.
Ref. PED 020 570
> Accessories
Stand
Ref. CGM 011 050
page 92
Rod
Ref. CGM 011 351
page 92
Elevator stand
Ref. POD 002 200
page 92
>
U ›shaped voltameter
Made of Ø 12 mm “U”-shaped glass tube, fitted on black Plexiglas plate.
The apparatus is provided with two coal electrodes, fitted on tip terminal.
Terminals are fitted on two slots on the plate.
The electrodes immersion can therefore be adjusted.
Dimension : 225 x 10 mm.
Provided without stand & rod.
Ref. PED 020 540
Accessories (see page 92)
> Pairs of plain electrodes
Iron electrodes (pair)
Ref. PED 039 251
Coal electrodes (pair)
Ref. PED 039 252
Copper electrodes (pair)
Ref. PED 039 253
124
Tel. + 33 (0)1 30 66 08 88
Electrochemistry
Volta cell
Identical to the original Volta cell. Constituted of one
stackage of ten cells, including one copper, felt & zinc
washer, fitted on a central glass rod. Washer Ø : 40 mm.
Ref. PED 021 030
> Daniell cell
Unpolarizing cell. Including : one glass tank, contents: one
litre, one zinc cylindrical electrode, one porous tank, one
copper cylindrical electrode.
Diameter : 105 mm
Height : 170 mm
Weight : 1.4 kg
Ref. CLM 066 500
ELECTROSTATICS,
> Spares for Daniell & LeclanchØ cells
> LeclanchØ cell
Depolarizing cell. Including : one glass tank, contents: one
litre, one zinc cylindrical electrode, one graphite electrode
into manganese dioxide bag.
Diameter : 105 mm
Height : 195 mm
Weight : 1.4 kg
Ref. CLM 066 510
>
Tulip
Zinc cathode with plug
CLM 066 530
Copper anode with plug
CLM 066 540
Carbone anode with plug
CLM 066 550
Porous tank
CLM 083 140
Tank, FB - VB - 1000 ml
CLM 085 140
voltameter
Ø 100 mm tank, in transparent plastic, unbreakable, acid & mineral base proof. Tank
height : about 85 mm.
Steady stand, with Ø 4 mm safety sockets. Height of the voltameters : 155 mm.
2 Models
WITH NICKEL ELECTRODES
Ref. CLM 066 000
Spare capless pair of electrodes
Ref. CLM 066 620
With PLATINUM ELECTRODES
Ref. CLM 066 010
Spare electrodes
Ref. CLM 066 030
Same display as the CLM 066 000 voltameter, but with two platinum electrodes, Ø
0.9 mm, fitted on the copper conductor.
www.didalab.fr
125
ELECTROSTATICS,
Electrochemistry
> Pair of electrode›holders
Nut fastening of the electrode-holder on laboratory stand rod.
• Adjustable electrode gaps (electrode-holder arm, with Ø 6 mm rod - L = 300 mm).
• Electrode-holder onto which plate electrodes or cylindrical electrodes can be indifferently
fastened.
• Equipped of two Ø 4 mm safety sockets.
Ref. CLM 066 090
> Electrodes for the pair of electrode›holders
> Plate electrodes
Dimension: 100 x 50 x 2 mm, excepted the Zinc electrode, dimension: 100 x 50 x
1.5 mm.
Aluminium - Ref. CLM 066 161
Iron - Ref. CLM 066 171
Copper - Ref. CLM 066 181
Zinc - Ref. CLM 066 191
> Cylindrical electrodes
Dimension: (Ø x W) : 6 x 120 mm.
Aluminium › Ref. CLM 066 100
Iron › Ref. CLM 066 110
Copper › Ref. CLM 066 120
126
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ELECTROSTATICS,
Magnets & compasses
> Ticonal magnets
Magnets are used to underscore the magnetic field B and its implications. Ticonal
is an alloy of Iron, Nickel, Aluminium & Cobalt. After magnetization, high coercive
field magnets are obtained. Magnetization has very long lasting.
Bar 100 x 20 x 10 › Ref. PED 039 040
In pair with armature › Ref. PED 039 070
Bar 25 x 6 x 6 › Ref. PAM 067 042 › Set of 10
Cylinder 60 diameter 3 › Ref. PAM 067 046 › Set of 10
> Magnetized bar on pivot
This bar can be projected on screen, usable as magnetized needle, has a very
steady magnetization. It is constituted of a Ticonal cylindrical bar, fitted on needle
pivot (extremely low friction). The North end is red. Length: 60 mm, diameter: 3 mm.
Ref. PED 039 100
> Magnetized needles
Very suitable needles for all experiments on the magnetic field.
Each needle is provided with stand point.
Length: 15 mm - Set of 10 - Ref. PED 025 041
>
Variable air›gap
magnet
“U”-shaped magnet, constituted of two removable arms enabling to make the
distance vary between the two magnets located on both sides. Adjustable air-gap
from 30 to 20mm. The magnetic field direction is also adjustable, depending on the
magnet direction into the air-gap. Dimension of “U “: 85 x 25 x (20 to 30) mm.
Provided with Manual.
Ref. PED 039 081
www.didalab.fr
127
ELECTROSTATICS,
Magnets & compasses
> Circuits for overhead projection
3 components fitted on transparent plastic stand, with two safety sockets. Stands are sprinkled with iron filings (not provided),
in order to display the circuits magnetic spectrum. Possible overhead projection during experiments.
Power Supply:6 or 12 V/10 Amp. (Ref. PMM 062 140, see page 141).
“Rectilinear” typical circuit,
Ref. PAM 067 720
“Circular” typical circuit
Ref. PAM 067 730
“Solenoid” typical circuit
Ref. PAM 067 740
Iron filings (500 g)
Ref. PED 039 120
> Magnetic spectrum for overhead projec
Simple apparatus enabling the underscoring of the lines of force of
the magnetic field in 1, 2 or 3 dimensions : the apparatus is
constituted of 4 plastic plates containing in total, 376 small
magnetic bars, 8 mm long. Each plate can be used either
separately or coupled to the others.
Dimension of each plate : 153 x 77 x 6 mm.
Set of 4 plates
Ref. PAM 067 480
128
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ELECTROSTATICS, MAGN EISM, ELECTROCHEMISTRY
ELECTROSTATICS,
Magnets & compasses
> Tangents compass
: RAYMAGNETfi
Presentation : this apparatus is displayed under the form of an Epoxy glass printed
circuit board. It is fitted onto insolated baseframe, insuring good steadyness of the
assembly. On one side, 4 turns of Ø 120, 160, 200 et 240 mm are available. These
turns can be separately connected through Ø 4mm sockets. Then B, function of R, can
be studied. On the other side, 5 turns of wider diameter are grouped together, making
a flat coil, enabling measurement on 1, 2, 3, 4 or 5 turns. Then B, function of N, can be
studied. A magnetized needle is located into the centre of the turns. It is moving above
one degrees graduated protractor. The access to the different turns is made through Ø
4mm safety banana plugs. Max. current, not over 1 min. : 5 Amp.
Dimension : Height: 340 mm - Width : 240 mm - Stand area: 240 x 137 mm. Weight :
0.8 kg. Provided with Manual.
Ref. PAM 067 500
> Oersted s needle
:
fi
OERSTED›DEMO
A magnetized needle is put on a pivot. This one is firmly attached to a
insolated stand onto which a stiff wire is fitted. The Oersted’s experiment
consists in positioning the stand in order to have the stiff wire in the needle
axis. When a current passes through this wire, the magnetized needle
deviates, tending to stand perpendiculary to the wire.
This puts into evidence that a conductor crossed by an electric current
generates magnetic field.
Connection to external circuit through Ø 4mm safety sockets. Max. current: 5
Amp..
Gross dimension : 130 x 70 x 60 mm.
Ref. PAM 067 710
> Declination compass
: TERRAMAGNETfi
This apparatus enables the underscoring of the earth magnetic field. Possible
illustration of the Ampere little man rule. The magnetized needle is fitted on
aluminium bracket.
This apparatus gives accurate results. It combines good needle rotation to a
maximum limitation of the friction.
Maximum intensity: 10 Amp.
Stand dimension : 130 x 80 x 36 mm - Needle length : 100 mm
Ref. PAM 067 530
www.didalab.fr
129
ELECTROSTATICS,
Electrostatics
> Needle electroscope
Demonstration of electrostatic voltages.
Provided with one load ball & one set of capacitor plates with
insolated rod.
Ring diameter: 150mm.
Capacitor plate diameter: 56 mm.
Ref. PED 038 681
>
Electrostatics
set
Simple apparatus enabling the underscoring of electrostatic phenomena.
The set includes :
• 1 light pendulum mounted on insolated bracket with very light plated ball
hanging on silk thread.
• 1 vulcanite stick: 8 x 200 mm (Ø x W).
• 1 glass stick: 8 x 200 mm (Ø x W).
• 1 piece of rabbit skin.
Ref. PEM 065 090
Vulcanite stick: 8 x 200 mm (x 10)
Ref. PEM 065 092
Glass stick: 8 x 200 mm (x 10)
Ref. PEM 065 094
130
Fax + 33 (0)1 30 66 72 20

DIDALAB-05-ELECTROSTATIQUE-XP6 ang._01363-DIDALAB

Transcription

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