By S.A. Reza Zekavat
For non-electrical engineering majors taking the advent to electric engineering course.
Electrical Engineering: options and Applications is the results of a multi-disciplinary attempt at Michigan Technological collage to create a brand new curriculum that's beautiful, motivational, and appropriate to scholars by way of developing many application-based difficulties; and supply the optimum point of either diversity and intensity of insurance of EE subject matters in a curriculum package.
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Extra resources for Electrical engineering : concepts and applications
33 mA. 33 mA * 33 k⍀ = 110 V Next, we are able to find the value of the power dissipated in the 33 k⍀ resistor. 47 is replaced by a dependent voltage source with its voltage a function of the voltage across the 3 kΩ resistor. 48 is driven by an electric motor that is connected to a voltage source of 200 V. In order to move the driveway gate, a force of 500 N or more is required. 2 ms−1 and that the gate path is 4 m long. Also, assume that the power required to start the motor is the same as the power required to move the gate.
Thus, based on this law, the sum of the currents entering a node is equal to the sum of the currents leaving that node. ) Law of the conservation of charge: Charges are always moving in a circuit and cannot be stored at a point; charge can neither be destroyed nor created. 12, Node A is between two elements 1 and 2, and the current entering Node A (i1) equals the current leaving Node A (i2). 12, Node A connects only two branches. In this case, we say element 1 is in series with element 2. Therefore, currents passing through the two elements in series are always the same in size and in direction.
As a result, the characteristic curve of a time-varying resistor will not have the same slope at all times. 40(a) may change with time. In general, in this book, we consider only linear time-invariant resistors and we simply call them resistors. 8 POWER AND ENERGY Electric circuits are used to generate energy for diverse applications. The electrical energy in power distribution systems is used to provide light, heat, and so on. The power and energy associated with a circuit element can be determined directly from the element’s current, i, and voltage, V.