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2.12. A metallic rod 1.2 m in length and having a mass of 500 gm is suspended by a pair of flexible leads in a magnetic field of 0.9 T as shown in Figure P2.12. Determine the current needed to remove the tension in the supporting leads. 2.13. A uniformly distributed toroidal coil of 400 turns is wound over an iron ring of square cross-section and carries a current of 200 A. The inner radius is 10 cm and the outer radius is 12 cm. The relative permeability of the iron ring is 1500. Determine (a) the flux in the ring, (b) the reluctance of the ring, and (c) the equivalent inductance of the toroid. 2.14. We wish to establish an air-gap flux density of 1.0 T in the magnetic circuit shown in Figure 2.14. If Ag = Am = 40 cm², g = 0.5 mm, m = 1.2 m, N 100 turns, and μ, = 2500, determine the current in the coil using (a) the reluctance concept and (b) the field equations. 2.15. Figure P2.15 shows a magnetic circuit made of a magnetic material for Fixed bar Flexible leads Metal rod Z 1.2 m Figure P2.12 A metal bar suspended with flexible leads.

2.12. A metallic rod 1.2 m in length and having a mass of 500 gm is suspended by a pair of flexible leads in a magnetic field of 0.9 T as shown in Figure P2.12. Determine the current needed to remove the tension in the supporting leads. 2.13. A uniformly distributed toroidal coil of 400 turns is wound over an iron ring of square cross-section and carries a current of 200 A. The inner radius is 10 cm and the outer radius is 12 cm. The relative permeability of the iron ring is 1500. Determine (a) the flux in the ring, (b) the reluctance of the ring, and (c) the equivalent inductance of the toroid. 2.14. We wish to establish an air-gap flux density of 1.0 T in the magnetic circuit shown in Figure 2.14. If Ag = Am = 40 cm², g = 0.5 mm, m = 1.2 m, N 100 turns, and μ, = 2500, determine the current in the coil using (a) the reluctance concept and (b) the field equations. 2.15. Figure P2.15 shows a magnetic circuit made of a magnetic material for Fixed bar Flexible leads Metal rod Z 1.2 m Figure P2.12 A metal bar suspended with flexible leads.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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use figure 2.12 for question 2.12

2.12. A metallic rod 1.2 m in length and having a mass of 500 gm is suspended by a pair of flexible leads in a magnetic field of 0.9 T as shown in Figure P2.12. Determine the current needed to remove the tension in the supporting leads. 2.13. A uniformly distributed toroidal coil of 400 turns is wound over an iron ring of square cross-section and carries a current of 200 A. The inner radius is 10 cm and the outer radius is 12 cm. The relative permeability of the iron ring is 1500. Determine (a) the flux in the ring, (b) the reluctance of the ring, and (c) the equivalent inductance of the toroid. 2.14. We wish to establish an air-gap flux density of 1.0 T in the magnetic circuit shown in Figure 2.14. If Ag = Am = 40 cm², g = 0.5 mm, m = 1.2 m, N 100 turns, and μ, = 2500, determine the current in the coil using (a) the reluctance concept and (b) the field equations. 2.15. Figure P2.15 shows a magnetic circuit made of a magnetic material for Fixed bar Flexible leads Metal rod Z 1.2 m Figure P2.12 A metal bar suspended with flexible leads.
Transcribed Image Text:2.12. A metallic rod 1.2 m in length and having a mass of 500 gm is suspended by a pair of flexible leads in a magnetic field of 0.9 T as shown in Figure P2.12. Determine the current needed to remove the tension in the supporting leads. 2.13. A uniformly distributed toroidal coil of 400 turns is wound over an iron ring of square cross-section and carries a current of 200 A. The inner radius is 10 cm and the outer radius is 12 cm. The relative permeability of the iron ring is 1500. Determine (a) the flux in the ring, (b) the reluctance of the ring, and (c) the equivalent inductance of the toroid. 2.14. We wish to establish an air-gap flux density of 1.0 T in the magnetic circuit shown in Figure 2.14. If Ag = Am = 40 cm², g = 0.5 mm, m = 1.2 m, N 100 turns, and μ, = 2500, determine the current in the coil using (a) the reluctance concept and (b) the field equations. 2.15. Figure P2.15 shows a magnetic circuit made of a magnetic material for Fixed bar Flexible leads Metal rod Z 1.2 m Figure P2.12 A metal bar suspended with flexible leads.
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