Download Electronic and Electrical Engineering: Principles and by L. A. A. Warnes (auth.) PDF
By L. A. A. Warnes (auth.)
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Extra resources for Electronic and Electrical Engineering: Principles and Practice
Sample text
18 = (V3 - V2)/20 and / 9 = Circuit analysis 34 (V3 - V1)/16. 90) The form of these equations is worth remarking: the first comes from using KCL at node C, where the voltage relative to node A is V1, and the only positive coefficient is that of V1• The same pattern is followed in the other two equations. Any mistakes in sign should soon be noticed and put right if the equations are written in this systematic way. 24 v and v3 = -118 v. 4 A, as before. 7 A. The solution is, as it must be, the same as that found by mesh analysis earlier.
Quantity, qrms, is defined by qnns For example if i(t) rrq 2
The meshes have been numbered 1, 2 and 3. , while mesh three 30 Circuit analysis represents a two-phase circuit for supplying relatively large loads such as a cooker or a heater. 10 resistances represent the wiring resistance. v1 B Mesh analysis. The circuit represents a domestic 2phase supply in North America. The 160. load is connected to both phases, so the voltage across it is approximately doubled. v7 . . . .. 1Q-- --v A -120 ... 1Q-- v! 4 -~/ ·····... ( . ·. ··... 1 Q F E The first step in the analysis is to assign clockwise currents to each mesh: in this case I 1, I 2 and I 3 to meshes 1, 2 and 3 respectively.