. 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. rst in one direction, then in the other, instep with the upper piston. The inertia of the fly wheel causes it to resist any changein its state, whether it be at rest or in motion, which is transmitted to the upper piston,causing it to offer resistance to any change in its rate or direction of motion. Inductancein the alternating current circuit has precisel
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. 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. rst in one direction, then in the other, instep with the upper piston. The inertia of the fly wheel causes it to resist any changein its state, whether it be at rest or in motion, which is transmitted to the upper piston, causing it to offer resistance to any change in its rate or direction of motion. Inductancein the alternating current circuit has precisely the same effect, that is, it opposes anychange in the strength or direction of the current. 1, 034 //.I WKINS ELECTRICITY Ques. How does the inductance of a coil vary withrespect to the core? Ans. It is least with an air core; with an iron core, it isgreater in proportion to the permeability* of the iron. The coefficient L tor a given coil is a constant quantity so long as themagnetic perineal>ility of the material surrounding the coil does notchange. This is the case where the coil is surrounded by air. Winniron is present, the coefficient L is practically constant, provided the mag-netism is not forced too hi^h. INDUCTIVE COIL. LAMPUCTIVE CO