Description
These little compasses are a great and very cost-effective tool to detect the presence and direction of magnetic fields.
Please don't use these compasses for navigation – that is not what they are intended for, and we certainly don't want you to get lost in the woods! You can make a far more reliable compass yourself by conducting the experiment "Find my direction magnetically".
Experiments
It is said that Hans Christian Ørsted noted this effect rather by accident when preparing a lesson: an electric current passing through a wire deflects a compass needle.
What determines the polarity and strength of an electromagnet? Just turn this experiment into a competition and your students will be eager to find out.
A bit off the coast of Antarctica. Really.
... with a compass instead of iron filings is not only easier but also reveals that the magnetic field has a direction.
Compare your homemade compass to the industrial version.
Specification
Details of a single compass:
| Type |
liquid filled |
| Diameter |
2 cm |
| Height |
0.8 mm |
| Weight |
2.3 g |
Sets
For your information, these are the prices of a single compass in different sets:
| Personal |
0.253€ |
| Small Class Set |
0.182€ |
| Regular Class Set |
0.158€ |
In case you prefer a different set size, you can order multiple personal sets – if the overall size exceeds the limits for small or regular class sets, the unit price is automatically adjusted. Please avoid combining different set sizes of the same product, since the system will not be able to adjust unit prices accordingly.
Our primary goal is to put science into the hands of school kids. These prices are therefore optimized for class sets, assuming a regular class size of up to 32 students, working in small groups of 3 students each. To provide 2 compasses to each of the eleven groups and 2 for you as teacher (or, if needed, as spare parts), the regular class set contains 24 compasses.
By paying a bit more for a personal set, you help us to offer class sets at a lower price.
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Ørsted's discovery
Electromagnet competition
Where is the Earth's magnetic north pole?
Mapping the magnetic field
Find my direction magnetically
