ME 340 HW 1 - Complex circuits with many resistors can be...

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Usman Ansari 01/24/2011 ME 340 Mechatronics – Homework 1 Mechatronics is the study of mechanical systems integrated with electrical engineering, which is composed of eight major subfields. An electrical circuit is the fundamental backbone to understanding circuit theory, which consists of current and voltage flowing through circuit elements. If a positive charge moves from the positive reference to the negative, then power is absorbed by the element, if opposite then vice versa. KCL and KVL state that the net current entering and leaving a node is zero and that the sum of voltages around a closed loop in a circuit is also zero. Two elements in series are connected end to end and have equal currents, while two elements connected directly from the top and bottom to each other are said to be in parallel, and their voltages are equal. Controlled voltage and current sources are dependent on other voltages or currents in the circuit.
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Unformatted text preview: Complex circuits with many resistors can be simplified to find the currents and voltages at each element by repeatedly summing resistances in series and parallel. The current and voltage division principles can be applied to find fractions of currents and voltages in resistances that are in parallel or series, respectively. The node-voltage and mesh-current methods can be used to find voltages and currents in any planar, resistive networks. A two-terminal circuit has a Thevenin and Norton equivalent that consists of a voltage source in series or a current source in parallel, with a resistor, respectively. The maximum power is reached when the load resistance is equal to the Thevenin resistance. The superposition principle can be used to solve a network by summing the responses of the individual sources in a circuit. The Wheatstone bridge is a circuit used to measure unknown resistances. 1...
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