使无罪 发表于 2025-3-21 18:08:18
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The Magnetic Field,etected by the mechanical force on iron filings, or on another magnet or on a current-carrying conductor. In some cases the magnetic field can be detected by sensing an e.m.f. which is induced in a coil of wire (.). We do not fully understand what a magnetic field is, and so we describe it as ..含铁 发表于 2025-3-22 11:00:44
Measuring Instruments and Measurements,dicated by means of a pointer. The indication given by a . is in the form of a series of numbers; the smallest change in the indicated quantity corresponds to a change of ± 1 digit in the least significant position of the number.出血 发表于 2025-3-22 15:19:34
Globalisation and Second Language IdentityAn electrical circuit is an interconnected network of conductors (or resistors) through which a current can flow. A . is a symbolic representation of such a circuit, and shows all the components forming the circuit.出血 发表于 2025-3-22 20:07:23
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Katrin Möltgen-Sicking,Thorben WinterAn alternating quantity is one which periodically alters its polarity or ‘direction’, having positive polarity during one part of its cycle and negative polarity in the remainder.LAY 发表于 2025-3-23 06:02:36
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