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Magnetism INEL 4151 Dr. Sandra Cruz-Pol Electrical and Computer Engineering Dept. UPRM
Applications Motors Transformers MRI More…
H= magnetic field intensity [A/m] B = magnetic field density [Teslas]
Biot-Savart Law States that:
Example For an infinitive line filament with current I ( 1 =180 o and 2 =0 o ): 2 1 a
PE. 7.1 Find H at (0,0,5) Due to current in (figure): where 1 =90 o and 10A 1 y z x 1 (0,0,5)
Amperes Law Simpler Analogous to Gauss Law for Coulombs For symmetrical current distributions
Amperes Law We define an Amperian path where H is constant.
Infinitely long coaxial cable Four cases: 1) For
Infinitely long coaxial cable Four cases: 2) For a<
Infinitely long coaxial cable Four cases: 3) For b<
Infinitely long coaxial cable Four cases: 4) For >b+c
Sheet of current distribution K [A/m] b a x z y Cross section is a Line! The H field on the Amperian path is given by:
PE. 7.5 Sheet of current Plane y=1 carries a current K=50 a z mA/m. Find H at (0,0,0). K =50 -x y z
Magnetism INEL 4151 Dr. Sandra Cruz-Pol Electrical and Computer Engineering Dept. UPRM ch 7
President UniversityErwin SitompulEEM 11/1 Dr.-Ing. Erwin Sitompul President University Lecture 11 Engineering Electromagnetics
Magnetic Forces, Materials and Devices INEL 4151 ch 8 Dr. Sandra Cruz-Pol Electrical and Computer Engineering Dept. UPRM
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MAGNETOSTATICS ONLINE TEST Q.NO.ANSWER Q.NO.ANSWER Q.NO.ANSWER
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Gauss’ Law for magnetic fields There are no magnetic “charges”.
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1 Magnetostatics. 2 If charges are moving with constant velocity, a static magnetic (or magnetostatic) field is produced. Thus, magnetostatic fields originate.
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Example: What is the magnetic field at the center of a circular arc of wire? 1 This will work for any current carrying arc, where (in radians) is the.
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