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Tesla |
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The tesla (symbol T) is a unit of measurement of the strength of the magnetic field. It is a derived unit of the International System of Units, the modern form of the metric system. One tesla is equal to one weber per square metre. The unit was announced during the General Conference on Weights and Measures in 1960 and is named in honour of Nikola Tesla.
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The Tesla is a large unit!
The strongest fields encountered from permanent magnets are from Halbach spheres which can be over 4.5 T. 
