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An iron rod is wrapped with a copper wire of 12 Q resistance to become an clectromagnet as shown in Figure 5. The voltage of the battery is 9V with no internal resistance. The length of the iron rod is 15 cm and its cross-sectional area is 220 mm². Given: The relative permeability of the iron rod, µ, is 4500. The permeability of free space, Ho, is 4x x 10-7 Hm'. + 9V batter O 15 cm A Iron rod of 220 mm² cross- Copper wire of 12 £2 sectional area resistance Figure 5 If the magnetic flux, Ø, measured at A is 0.12 mWb, determine: (i) the polarity of magnetic field at A and the name of the rule; (ii) the magnetic flux density of the iron rod at B; (iii) the magnetic field intensity, H, induced in the iron rod; (iv) the magnetomotive force, MMF, induced in the iron rod;

An iron rod is wrapped with a copper wire of 12 Q resistance to become an clectromagnet as shown in Figure 5. The voltage of the battery is 9V with no internal resistance. The length of the iron rod is 15 cm and its cross-sectional area is 220 mm². Given: The relative permeability of the iron rod, µ, is 4500. The permeability of free space, Ho, is 4x x 10-7 Hm'. + 9V batter O 15 cm A Iron rod of 220 mm² cross- Copper wire of 12 £2 sectional area resistance Figure 5 If the magnetic flux, Ø, measured at A is 0.12 mWb, determine: (i) the polarity of magnetic field at A and the name of the rule; (ii) the magnetic flux density of the iron rod at B; (iii) the magnetic field intensity, H, induced in the iron rod; (iv) the magnetomotive force, MMF, induced in the iron rod;

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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An iron rod is wrapped with a copper wire of 12 Q resistance to become an clectromagnet as shown in Figure 5. The voltage of the battery is 9V with no internal resistance. The length of the iron rod is 15 cm and its cross-sectional area is 220 mm². Given: The relative permeability of the iron rod, µ, is 4500. The permeability of free space, µo, is 47 x 10-7 Hm'. + 9V batter 15 cm A Iron rod of 220 mm² cross- Copper wire of 12 2 sectional area resistance Figure 5 If the magnetic flux, Ø, measured at A is 0.12 mWb, determine: (i) the polarity of magnetic field at A and the name of the rule; (ii) the magnetic flux density of the iron rod at B; (iii) the magnetic field intensity, H, induced in the iron rod; (iv) the magnetomotive force, MMF, induced in the iron rod; (v) the current flowing in the copper wire; (vi) the minimum number of turns required to generate the required magnetic flux, Ø; and (vi) suggest TWO (2) methods to generate a larger flux based on the above setup.
Transcribed Image Text:An iron rod is wrapped with a copper wire of 12 Q resistance to become an clectromagnet as shown in Figure 5. The voltage of the battery is 9V with no internal resistance. The length of the iron rod is 15 cm and its cross-sectional area is 220 mm². Given: The relative permeability of the iron rod, µ, is 4500. The permeability of free space, µo, is 47 x 10-7 Hm'. + 9V batter 15 cm A Iron rod of 220 mm² cross- Copper wire of 12 2 sectional area resistance Figure 5 If the magnetic flux, Ø, measured at A is 0.12 mWb, determine: (i) the polarity of magnetic field at A and the name of the rule; (ii) the magnetic flux density of the iron rod at B; (iii) the magnetic field intensity, H, induced in the iron rod; (iv) the magnetomotive force, MMF, induced in the iron rod; (v) the current flowing in the copper wire; (vi) the minimum number of turns required to generate the required magnetic flux, Ø; and (vi) suggest TWO (2) methods to generate a larger flux based on the above setup.
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