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Electric Field Lines • Lines point in the same direction as the field. • Density of lines gives the magnitude of the field. • Lines begin on + charges; end on –charges. We visualize the field by drawing field lines. These are defined by three properties:
13 Ιαν 2021 · Explain what a continuous source charge distribution is and how it is related to the concept of quantization of charge; Describe line charges, surface charges, and volume charges; Calculate the field of a continuous source charge distribution of either sign
Learn about concept and derivation of electric field due to finite line charge at equatorial point and electric field due to a line of charge at axial point.
To look at the meaning of linear, area, and volume charge densities. To calculate the electric field from a line of charge along two different directions. To examine the limiting behavior of the two expressions when the length of the line goes to zero, to make sure we recover the results we expect.
Principle of superposition. Coulomb’s law. The interaction between any two charges is completely unaffected by the presence of other charges. Or we can say that if q1 produces a field of 1 and q2 produces another field , then the field produced by q1 + q2 will be 3 + . Superposition theorem.
Our first step is to define a charge density for a charge distribution along a line, across a surface, or within a volume, as shown in Figure 5.22. Figure 5.22 The configuration of charge differential elements for (a) a line charge, (b) a sheet of charge, and (c) a volume of charge.
Note the units for surface charge density will be charge/area (e.g. C/m2). Line Charge Density Finally, we also consider the case where charge is unevenly distributed across some contour C. We can therefore define a line charge density as the charge ∆Q along a small distance ∆A, located at point r of contour C. C ∆A r
