Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 247
find thecurrent that will flow through the capacity at 30, 60, 90 and 120 cycles. X, the reactance = 2 „„ = 50 ohms at 60 cycles, from last problem = 100 ohms at 30 cycles= 33.3 ohms at 90 cycles= 25 ohms at 120 cycles I, the current = E/X= 110/100 = 1.1 amp. at 30 cycles = 110/50 = 2.2 amp. at 60… … Fig. 245.—One method of constructing condensers. rent of 2.2 amp. at 110 volts and 60 cycles. It is desirable toknow the approximate dimensions of such a condenser. The capacity of a parallel plate condenser is given by theformula ~. - , 1 1 kA Cmfarads = Sx93aonx~r where A is the area of the…
Electrical engineering
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