Magnetism - Frederiksen

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magnetism
Permanent magnets
3300.00
3305.00
Cylindrical magnet, Neodymium
Diameter 30 mm, thickness 6 mm. Mounted in a holder on a
10 mm diameter stainless steel rod.
Can be used in conjunction with induction coils for the
demonstration of alternating current (AC).
3320.00 Cylindrical magnet
Cylindrical magnet with bearing
Like 3320.00, but with ball bearing and pulley.
3320.10 Cylindrical magnet with bearing
Lodestone
Specimen for demonstration. A small piece of magnetic iron ore.
3300.00 Lodestone
Bar magnets, Al-Ni-Co with holder
Cylindrical magnets, 11 mm diameter, length 170 mm, with
keepers and coloured poles. Supplied in a wooden holder.
3305.00 Bar magnets, Al-Ni-Co
Bar magnets, Al-Ni-Co
Like 3305.00 but without wooden holder.
3305.01 Bar magnets, Al-Ni-Co
Bar magnets, Al-Ni-Co
A pair of square section
magnets 10 x 10 mm with
coloured poles.
Length 100 mm.
3305.10 Bar magnets, Al-Ni-Co
3305.10
3320.10
3320.00
Bar magnets, Al-Ni-Co, cylindrical
Pair of cylindrical magnets, 5 mm diameter, length 50 mm.
3305.30 Bar magnets, Al-Ni-Co
Bar magnet AI-Ni-Co, square
Pair of square section magnets 15 x 10 mm. Length 50 mm.
3308.10 Bar magnets AI-Ni-Co
3308.10
3315.30
U-Shaped magnet, Al-Ni-Co
A magnetized Al-Ni-Co block attached to two parallel mild steel
pole pieces. Overall dimensions 30 x 82 x 135 mm. Distance
between poles 59 mm. With keeper and coloured poles.
3315.00 U-Shaped magnet, Al-Ni-Co
3305.30
U-Shaped magnet, Al-Ni-Co
Like 3315.00 but smaller. Overall dimensions 15 x 60 x 90 mm.
Distance between poles 48 mm.
3315.10 U-Shaped magnet, Al-Ni-Co
3315.10
3315.00
Horseshoe magnet
Made of 6 % chrome steel, Supplied with keeper.
Overall length 125 mm.
3315.30 Horseshoe magnet
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Neodymium magnets
Neodymium magnets are rare earth magnets containing iron,
neodymium and boron. These magnets are very powerful and
they are capable of detecting magnetic properties in materials
you would never have expected. Whenever the topic of
magnetism is investigated these magnets are excellent for illustrating
magnetic properties. Great for induction experiments.
Place a magnet on either side of the palm of your hand just to
illustrate how powerful they are.
3318.00 Neo-magnets Ø 10 x 6 mm, boxed pair
3318.10 Neo-magnets Ø 10 x 8 mm, boxed pair
3318.20 Neo-magnets Ø 14 x 8 mm, boxed pair
U-Shaped magnet
Made of chrome steel, with keepers.
Dimensions: 107x 85 x 50 mm.
Distance between poles: 64 mm.
3315.20 U-Shaper magnet
Pole shoes and core
For U-Shaped magnet 3315.20. For demonstration of magnetic
field.
3340.00 Pole shoes and core
Magnet holder
Magnet holder for U-Shaped magnet 3315.20.
For rotating the magnet in longitudinal direction.
3325.00 Magnet holder
3340.00
3315.20
3318.00-.20
3325.00
Warning! Strong magnets are dangerous if
swallowed! Never allow small children to
work with neodymium magnets without adult
supervision.
Never store or use these magnets near
computer disks, credit cards or other
magnetic media.
3450.00
3390.00
Support for bar magnet
For holding a bar magnet to demonstrate repulsion and
atraction. Made of nickel-plated brass. Requires a stand e.g.
3415.00. For magnets up to max. 11 mm square or diameter.
3330.00 Support for bar magnet
3330.00
Round magnet
with ring
Circular ceramic magnet glued to a plastic plate and mounted
with eye. Dimensions: 10 mm x Ø 20 mm. Used with dynamometer
to determine magnetic field force.
3450.00 Round magnet with ring
Materials set for magnetism
Consists of 8 plates of magnetic and non-magnetic materials
each 65 x 25 mm. Materials provided are: Brass, nickel, lead,
copper, aluminium, iron, zinc and plastic.
3390.00 Materials set for magnetism
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magnetism
Iron filings
150 g of iron filings in polythene shaker.
3375.00 Iron filings
3375.00
Magnetic field demonstrator
For demonstration of two- and three-dimensional magnetic
field lines. The set includes a magnetic field box, a magnetic
field plate and three magnets (2 bar magnets and a horseshoe
magnet). The magnetic field box and the plate contain iron
filings suspended in a viscous liquid. A bar magnet can be
placed in the middle of the box. The plate can be used with
both bar magnet and horseshoe magnet.
Dimensions, box: 76 x 76 x 76 mm, plate: 91 x 157 x 9 mm.
3396.10 Magnetic field demonstrator
Magnetic field demonstrator
For demonstration of two-dimensional magnetic field lines. The
field is visualized by iron filings suspended in a viscous liquid.
(Magnet not included.) Dimensions: 223 x 122 x 11 mm.
3396.20 Magnetic field demonstrator
Magnetic field demonstrator
Elegant and easy to use – a handy replacement of iron filings.
The perfect aid for clearly revealing the magnetic field lines in
2 or 3 dimensions. Equally suited for demonstration purposes
and student experiments.
The kit consists of 4 plastic plates which contain a total of 392
small 8 mm magnetic pins. The plates are transparent and can
be used with an overhead projector.
Dimensions of each plate: 153 x 77 x 6 mm.
3395.20 Magnetic field demonstrator
3396.20
3396.10
3395.20
Magnetic field demonstrator
For demonstration of two-dimensional magnetic field lines
from a magnet placed on top of the box. The box consists of
11 x 16 small arrow shaped compass needles in acrylic
housing. Dimension: 15x15 cm.
3395.30 Magnetic field demonstrator
3395.30
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Suspended magnet
Two axially magnetized ceramic ring magnets placed on a
clear Plexiglas rod. The upper magnet is hovering because of
the magnetic repulsion.
Diameter of magnets: 36 mm. Total height: 135 mm.
3440.00 Suspended magnet
Lenz’s Law, open version
Demonstration of magnetic braking.
When a strong magnet rolls down the aluminium U-profile, the
changing magnetic field will induce an eddy current in the U-
profile. According to Lenz’s law, this current will generate a
new magnetic field opposing the changes in the original field.
The motion will be slowed down dramatically.
Delivered with two neodymium magnets and two non-magnetic
dummies of stainless steel.
4602.20 Lenz’s Law
3440.01
3440.00
Ring shaped magnet
Axially magnetized ceramic ring magnet. To be used with
3440.00. Dimensions: Outer/inner diameter: 36 mm / 17 mm.
Height: 8 mm.
3440.01 Ring shaped magnet
4602.20
Lenz law kit
Copper tube, length 18 cm and two ring shaped neodymium
magnets.
4602.10 Lenz law kit
4602.10
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magnetism
Compasses
Compasses, transparent
Useful in demonstrations of magnetic field strength. The
compass needle is supported in a sealed plastic housing with
transparent top and bottom. Well suited for use on an overhead
projector. Diameter: 19 mm. Package of 12.
3400.10 Compasses, transparent
3400.10
Compass SILVA Ranger
Transparent base plate 11 x 54 mm, with magnifying lens and
scales. Dial 360°. Alcohol-filled Ø 50 mm rotatable house.
Needle is with agate pivot.
3405.15 Compass SILVA Ranger
3405.15
Pocket compass
Low cost pocket compass
with 360° dial with 5°
graduation. Nickel plated
brass housing. Needle
placed on stone bearings.
Ø 40 mm.
3405.05 Pocket compass
Compass, low cost
3405.05
Land compass with 360°
graduation. Transparent base
plate. Liquid filled compass
housing.
3405.10 Compass, low cost
Storage case for 3405.15
Case with lining for storing up to 24 SILVA compasses 3405.15.
3405.18 Storage case for 3405.15
Demonstration
compass for OHP
The ideal tool for teaching
the use of 3405.15 and
other base plate compasses.
Model for Overhead
Projector, size: 48 x 25 cm.
3405.16 Demonstration
compass for OHP
3405.18
3405.10
3405.16
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Dip needle for suspension
With magnetic steel needle, 105 mm long, fully rotatable.
Mounted in holder with agate cup bearings and suspension
hook.
3425.00 Dip needle for suspension
3430.00
Dip needle on base
With magnetic steel needle, 105 mm long, fully rotatable.
Mounted in a holder with agate cup bearings and inclination
scale. The system can be moved from the vertical to the horizontal
plane and serve as an ordinary magnetic needle.
3430.00 Dip needle on base
Compass card, cardboard
The diameter of the compass card is 65 mm.
3407.00 Compass card, cardboard
Magnetic needle
Carbon Steel with nickel-plated brass bearing pivot.
Length 110 mm. (Stand not included.)
3410.00 Magnetic needle
3425.00
3407.00
Stand for magnetic needle
Non-magnetic metal pillar with carbon steel point on stable
base. Height 110 mm.
3415.00 Stand for magnetic needle
Demonstration magnetic needle
Length 150 mm with coloured polarity indication and agate
cup bearing. Base with needle is included.
3420.00 Demonstration magnetic needle
3420.00
3410.00
3415.00
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magnetism
Magnetic field pattern, vertical conductor
With a 149 x 200 mm Perspex base with 4 mm sockets. Can
be used on an overhead projector. The field is made visible
with iron filings.
4550.00 Magnetic field pattern, vertical conductor
4550.00
Induction coil, hanging
This is used along with a cylindrical magnet with bearing
3320.10 for demonstrating
induced voltages. Because
the coil windings can be pulled
apart, the rotatable magnet
can be mounted within
the coil and rotated using a
small motor (no. 2025.00).
The diameter of the copper
wire is 2 mm.
The length of the
un-stretched coil is 200 mm.
4556.00 Induction coil,
hanging
4556.00
Magnetic field pattern, 1 turn
Like 4550.00 but with a single turn coil.
4550.10 Magnetic field pattern, 1 turn
4550.10
Magnetic field pattern, 10 turns
Like 4550.10 but with a ten turns coil.
4550.20 Magnetic field pattern, 10 turns
Hans Christian Ørsted’s apparatus
This apparatus is used to demonstrate the action of a current
carrying conductor on a compass needle. The compass needle
and the current carrying conductor are mounted on a transparent
acrylic plate with a compass card. A DC current of up to
about 3 A is sent through the conductor via 4 mm safety jacks.
The device can be used on an overhead projector.
Length of the compass needle: 105 mm.
4557.10 H.C. Ørsted’s apparatus
4550.20
4557.10
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Pohl swing
For demonstration of
the force on a current
carrying wire in a
magnetic field.
Height: 270 mm
Width: 100 mm
Depth: 160 mm
4555.00 Pohl swing
4555.00
4565.00
4555.10
Apparatus for Laplace’s law
This apparatus demonstrates the force on a conductor in a
magnetic field. It consists of a pair of metal rails with 4 mm terminals.
A light aluminium axle can roll freely along the rails and
thus completes the electrical contact between them.
A strong U-shaped magnet is required to complete the setup,
use e.g. item no. 3315.00 (not included).
Place the axle on the rails between the poles of the magnet.
When a current flows through the axle, it will be influenced by
a force perpendicular to both the axle and the magnetic field
– i.e. along the rails.
Dimensions: 190 x 85 x 65 mm.
4555.10 Apparatus for Laplace’s law
Current balance I
For demonstrating and measuring the interaction between an
electric conductor and a magnetic field. The proportionality
between force, current and conductor length can be shown.
The equipment consists of a magnet holder with removable
permanent magnets and a holder for wire frames which are
mounted by means of 4 mm plugs.
The set consists of:
– 1 magnet holder with 6 permanent magnets
– 1 holder for wire frames
– 6 wire frames with wire lengths of 8 - 6 - 4 - 3 - 2 - 1 cm
For the experiment you will also need a retort stand, a balance
with 0.01 g accuracy and a variable DC power supply. A
power supply with a variable current limiter like 3630.00 is
most convenient.
4565.00 Current balance I
Current balance II
This is an extension for 4565.00 in
order to show the angle dependency
of the magnetic force.
The permanent magnet assembly
has a large gap in order to allow
the vertical part of the conductor
to rotate in the field. The scale has
one degree subdivisions and can
easily be zeroed. (You will also need
4565.00 – as well as a stand, a
balance and a power supply.)
4565.10 Current balance II
4565.10
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magnetism
Magnaprobe
Designed for work with magnetic fields in the laboratory. Alternative
to plotting compasses when investigating the fields
around magnets or coils etc.
3435.00 Magnaprobe
3435.00
Pole finder for magnets
Pole Finder for determination of magnetic north/south polarity.
LED indication.
4060.40 Pole finder for magnets
4060.40
Teslameter
This simple, user-friendly instrument is designed to measure
high magnetic field strengths e.g. from AINiCo magnets, coils
and electromagnetic experiments. An auto scaling feature provides
automatic switching between measuring ranges.
Measuring ranges:
0.01 – 2 T (resolution 1 mT)
1 – 200 mT (resolution 0,1 mT)
Precision: 5%
Size:
Magnetic field probe (without holder):
80 mm long, 8 mm wide, 2 mm thick.
Readout instrument: 158 x 108 x 56 mm.
Includes power supply for
230 V AC European plug
4060.50 Teslameter
4060.50
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