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 311
nge in the frequency will unbalancethe forces acting on the shaft and cause the pointer to assume anew position, when the forces are again balanced. The aluminumdisc is so arranged that when the shaft turns in one direction 1,830 HAWKINS ELECTRICITY the torque of the magnet tending to rotate it… … SCALE-POINTER7PRESSURE COIL FlG. 2,568.—Langsdorf and Begole frequency meter. The operation of this meter is basedon the fact that if an alternating pressure of E Volts be impressed on a condenser ofcapacity C, in farads, the current in amperes will be equal to 2v ~ EC, provided the pres-sure be…
Electrical engineering
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