Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 64
of resistance is the methodadapted? Ans. Since it is a nil or zero method, it is better adapted tothe measurement of non-inductive than of inductive resistances. TESTING AND TESTING APPARATUS 483 Ques. What precaution should be taken with inductiveresistances? Ans. The current must be allowed to… … TWO WAYSWITCH KNOWN RESISTANCE UNKNOWN RESISTANCE■*>A\A/VvVvVvW—— BATTERY I I I Fig. 558.—Drop method of testing resistances. The apparatus is connected as shown andreadings taken with voltmeter across known and unknown resistance. The unknownresistance is then easily calculated. Drop…
Electrical engineering
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