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), 1833-1928 · New York : T. Audel & Co. · leaf 137
. How does the magnetic strength of a solenoidvary? Ans. It is proportional to the strength of the electric currentpassing through it. MAGNETISM 117 Ques. On what, besides the current strength, does themagnetizing power of a solenoid depend ? Ans. The magnetic effect or the magnetizing power is… … f^--/£ DIRECTION OF MAGNETIC FORCE.% Fig. 119.—Right hand rule for polarity of a solenoid: If the solenoid be grasped in the righthand, so that the fingers point in the direction in which the current is flowing in the wires,the thumb extended will point in the direction of the north pole. Ques.…
Electrical engineering
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