ECEN 3613 Lecture Notes - Lecture 15: Magnetostatics, Solenoid, Inductance
18 Nov 2016
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Volume and surface current density: know how to get charge from volume current density. Ampere"s law, line integral around path times h equals total current enclosed (example 4. 7) Stocke"s theorem will not be asked to verify. 4. 49 works but it can be complicated to work out. Be prepared to simplify equations and problems to. First find directions, so things can be canceled or calculated easily. Torque: can be easily calculated if b field is constant. Inductance: know how to calculate inductance and energy stores in region based on magnetostatic field and ms flux density. Example 4. 16 energy stored within a wire is a nice example to look at. Faraday"s law: time change magnetic field generates vemf. Use ampere"s law when the symmetry of the problem shows that h is constant magnitude and tangential to a path everywhere. Ampere"s law holds, but we cannot use it to find h field changes on path.
