Practical Electricity a Laboratory And Lecture Course for First Year Students
The book Practical Electricity a Laboratory And Lecture Course for First Year Students was written by author W E William Edward Ayrton Here you can read free online of Practical Electricity a Laboratory And Lecture Course for First Year Students book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Practical Electricity a Laboratory And Lecture Course for First Year Students a good or bad book?
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88 and A in Fig. 94 measures is the current flowing through the main conductor, K in Fig. 88 and c in Fig. 94 respectively, whereas the current that the voltmeter v, Fig. 94, measures is the current that the P. D. Between the terminals of the main conductor c will send through a resistance which is quite external to the main circuit, viz. The resistance of the voltmeter itself. If the resistance of an ammeter be but a small fraction of the resistance of the rest of the circuit in which it is pl...aced, the cnly result of short-circuiting the ammeter by bridging its terminals with a short piece of thick wire, is to electrically remove the instrument from the circuit, for the current remains practically unchanged in strength, and practically the whole of it now passes through the short circuit : whereas in short-circuiting a voltmeter we short-circuit all that part of the circuit with the terminals of which the voltmeter is connected, and thus cause a great, and possibly a dangerous, increase in the current in the remainder of the circuit.
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