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 48
XAMPLE.—An air core coil has an average radius of 10 centi-meters and is 20 centimeters long, there being 500 turns, what is theinductance? Substituting these values in formula (1)I = 4X (3.1416)2 X 102 X 5002 -v- (20 X 109) = .00494 henry HAWKTXS ELECTRICITY Ques. Is the answer in the above… … Figs. :.- 27.—General Electric choke coils. Fig 1,273, hour glass coil, 35.000 volts; 27 SjBO i 274, ••Ovoinductance and sm~.used ei-.er.s. primary objects of the cholfrom the transformer or tIf there be no lightning an2. to lower the frecboke c jil will be < 1first turns of the end coil inthis…
Electrical engineering
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