Definition: Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.
Input: original question: In which measurement system, [Tesla] is the magnetic flux density unit?
answer: international system of units
answer type: Measurement System.
auxiliary information: The tesla is the SI derived unit of magnetic flux density, commonly denoted as B. One tesla is equal to one weber per square metre, and it was named in 1960 in honour of Nikola Tesla. The strongest fields encountered from permanent magnets are from Halbach spheres which can be over 4.5 T. The strongest field trapped in a laboratory superconductor as of July 2014 is 17.6 T. The record magnetic field has been produced by scientists at the Los Alamos National Laboratory campus of the National High Magnetic Field Laboratory, the world's first 100 Tesla non-destructive magnetic field. The unit was announced during the Conf√©rence G√©n√©rale des Poids et Mesures in 1960.

[Tesla] is used as the magnetic flux density unit in what measurement system?