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;
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter12: Electronic Control Devices
Section: Chapter Questions
Problem 14RQ
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