13. A coil with 60 turns wound over a ferromagnetic core having relative permeability 400 has an inductance of 50 mH. If coil turns are doubled and the core is replaced by a new ferromagnetic core having relative permeability 600, the new inductance would be (a) 0.03 H (b) 0.3 H (c) 3 H (d) 0.15 H

13. A coil with 60 turns wound over a ferromagnetic core having relative permeability 400 has an inductance of 50 mH. If coil turns are doubled and the core is replaced by a new ferromagnetic core having relative permeability 600, the new inductance would be (a) 0.03 H (b) 0.3 H (c) 3 H (d) 0.15 H

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 11RQ

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Question

(a)
13. A coil with 60 turns wound over a ferromagnetic core having relative permeability 400 has an
inductance of 50 mH. If coil turns are doubled and the core is replaced by a new ferromagnetic
core having relative permeability 600, the new inductance would be
(a) 0.03 H
(b) 0.3 H
(c) 3 H
altarnator will reverse if
(d) 0.15 H

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