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13. A toroidal (ring) magnetic core, with an average circumference of 400mm and a cross- sectional area of 5 cm2, has a coil of 200 turns wound around it. What value of coil current is required to produce a flux of 800 µWb (micro-Weber) in the core, if the reluctance of the core is 1,687500 At/Wb? А. 5.25 А В. 5.75 А С. 6.25 А D. 6.75 A E. 7.25 A

13. A toroidal (ring) magnetic core, with an average circumference of 400mm and a cross- sectional area of 5 cm2, has a coil of 200 turns wound around it. What value of coil current is required to produce a flux of 800 µWb (micro-Weber) in the core, if the reluctance of the core is 1,687500 At/Wb? А. 5.25 А В. 5.75 А С. 6.25 А D. 6.75 A E. 7.25 A

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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13. A toroidal (ring) magnetic core, with an average circumference of 400mm and a cross- sectional area of 5 cm2, has a coil of 200 turns wound around it. What value of coil current is required to produce a flux of 800 µWb (micro-Weber) in the core, if the reluctance of the core is 1,687500 At/Wb? А. 5.25 A В. 5.75 А С. 6.25 А D. 6.75 A E. 7.25 A 14. A magnetic core, with an average path length of 60cm and a cross-sectional area of 9 cm?, has a coil of 180 turns wound around it. What is the flux density in the core if the coil current is 3.25A? Assume a relative core permeability of 1200. А. 1.42 T В. 1.47 T С. 1.50 T D. 1.56 T Е. 1.60 T 15. A circular magnetic core has an average path length of 50 cm and a cross-sectional area of 40 cm. The core is wound with a 300 turns coil. If a coil current of 5 A is required to- establish a flux density of l.5 T in the core, what is the permeability of the core? 5 x 10:7 At/Wb
Transcribed Image Text:13. A toroidal (ring) magnetic core, with an average circumference of 400mm and a cross- sectional area of 5 cm2, has a coil of 200 turns wound around it. What value of coil current is required to produce a flux of 800 µWb (micro-Weber) in the core, if the reluctance of the core is 1,687500 At/Wb? А. 5.25 A В. 5.75 А С. 6.25 А D. 6.75 A E. 7.25 A 14. A magnetic core, with an average path length of 60cm and a cross-sectional area of 9 cm?, has a coil of 180 turns wound around it. What is the flux density in the core if the coil current is 3.25A? Assume a relative core permeability of 1200. А. 1.42 T В. 1.47 T С. 1.50 T D. 1.56 T Е. 1.60 T 15. A circular magnetic core has an average path length of 50 cm and a cross-sectional area of 40 cm. The core is wound with a 300 turns coil. If a coil current of 5 A is required to- establish a flux density of l.5 T in the core, what is the permeability of the core? 5 x 10:7 At/Wb
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