ECE106 Lecture 63: ECE 106,University of Waterloo,(p63)

• School: University of Waterloo
• Department: Electrical and Computer Engineering
• Course: ECE106
• Professor: All

Document Summary

By definition, power is consumed (or flow) per unit time, i. e. p = du = ivab. If we use resister for power consumption dt. Recall, magnetic charges do not exist: any electric current (moving electric charge) produces magnetic field (b ) around itself. Similar to coulomb"s law, for magnetic fields we have biot-savart law which can be used to calculate magnetic field (b ) produced by a current element (a source concept, similar to a point charge). At the observation point p , db = T, tesla where 0 is the permeability of free-space (vacuum). It is a parallel concept to s0 permittivity. For a general current carrying conductor, id l r r2. 4 here the integral is over the entire carrying conductor. Example 1 magnetic field due to a straight long current carrying. (8. 1) (8. 2) (8. 3) (8. 4)