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单词 ampere's rule
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Ampere's rule
1. Designating various laws of electromagnetism derived by or attributed to Ampère, as Ampere's law, Ampere's rule, etc.; esp. (a) the theorem that the integral of a magnetic field along a closed path is proportional to the current enclosed by the path; (b) a rule for finding the direction of the magnetic field produced by a current flowing through a wire; = right-hand rule n. (a) at right hand n. and adj. Compounds.
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ampere1846
1846 E. West tr. C. F. Peschel Elem. Physics III. 207 All the mutual action of magnets and electric currents..are explicable, according to Ampère's law [Ger. nach dem Ampère'schen Gesetze] of the influence of electric currents on each other.
1884 S. P. Thompson Dynamo-electr. Machinery ii. 7 A more usual rule for remembering the direction of the induced currents is the following adaptation from Ampère's well-known rule.
1953 E. R. Peck Electr. & Magnetism vii. 215 Equation (7.67) is a statement of Ampère's circuital law.
2013 N. Giordano College Physics (ed. 2) II. xx. 688 The mathematics of Ampère's law is manageable when one can find a path along which the magnetic field is constant.
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