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 242
valve. Constant secondary voltagetest. Loaded on non-inductive resistances. Frequency 50. Maximum power factoron valve .7. Ques. Upon what does the efficiency of the film depend ? Ans. Upon the temperature. It should not for maximum efficiency exceed 86 degrees Fahr. Thereis also a certain critical… … + BATTERYNO.! BATTERY DISCHARGESWITCH TO LOAD A I A Q 0 Q o-TE5T FOR RECTIFIERAND FORMING FILM ONELECTRODES „ BATTERY Zl*56> — O- \ REGULATOR FORCHARGING CURRENT Q Q BATTERY ^\^o0„^CHAR6IN6 SWITCH ^o°o0oo0^? RECTIFIER BELLS— CLOCKS-f TELEPHONEPORCELAIN ETC. TO LEADS
Electrical engineering
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