At some point during our primary school careers, most of us probably constructed a simple compass, often by floating a ...
If shrunken down to micron size, a compass needle could wobble. (Courtesy: iStockphoto/tobias machhaus) A tiny magnetic needle just 10 μm long could be used to create a magnetic-field sensor that – if ...
A magnetometer is a device that measures magnetism: the direction, strength, or relative change of a magnetic field at a ...
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