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Problem of the month (Nov. 2022) – Moving teslameter

Published on 21 November 2022

Electric current flows in a wire, such that the conducting particles (electrons) acquire the drift velocity v. A teslameter at rest with respect to the wire measures magnetic field of 1 T. What field is it going to measure when moving with the speed v, while being at the same distance from the wire ? Answers please send to alexey.kuzmenko@unige.ch.