ECE106 Lecture Notes - Lecture 7: Test Particle, Electric Field, Unit Vector

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

Document Summary

Figure 3. 2: two charges interacts through an electric field. The vector field can be used to describe water flow, atmospheric wind, gravitation force, elec- tromagnetic force, etc. A scalar field or scalar function has a magnitude only (no direction), and, in general, is a function of space and/or time, e. g. temperature distribution, potential distribution, etc. We no longer regard the interaction between the charges directly. 3. 1) we saw that r = r/r is the unit vector in the direction of interacting r. next, consider q to be a test-charge; move it around q and note the force experienced by it. We are finding the force field established by q around itself. This force field, on unit test-charge is called the electric field e . It looks similar to f q but does not have q any more.