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- 4 - Which of the following is true regarding Kirchhoff's Rules?I. Joint Rule, the current from a node in the circuit tells us that the sum of the current from the node.II. If we pass an emf source in the circuit in the direction of the emf, the potential change we will get for Kirchhoff's voltage rule is +V.III. If we pass an emf source in the opposite direction of the emf in the circuit, the potential change we will get for Kirchhoff's voltage rule is +V. A) Only I B) II and III C) I, II and III D) Only II E) I and IIa) Explain the construction of LVDT. Identify some suitable examples according to their applications b) Discuss contacting and non-contacting tachometers Note question is taken from instrumentation and measurements courseAn impedance coil is connected in series with a fixed resistor, and a 120-V, 50-cyclesource is then impressed across the combination. If the voltage drops across the coil andthe fixed resistor are 70 and 80 V, respectively, when the circuit current is 1.4 A, calculatethe resistance and inductance of the impedance coil.
- In the figure, the K mechanical switch is switched from 1 to 2 at t = 0. In short, the load remained connected to the 2A current source for a long enough time. a) Obtain instantaneous value expressions of Vr and VL voltages in the new state. b) After t = 0.5 s, calculate the values of the voltage at the resistor ends of the circuit element. Obtain the instantaneous expressions of current and voltages.1. Thyristor-Controlled Series Capacitor (TCSC) for power factorimprovement2. What are the constraints are followed in Unit commitment?Compute for IN, RN and the current passing though the 25-ohm resistor using Norton’s Theorem. Answer neatly and please explaiin the process
- The AC Bridge shown below is used to measure an unknown inductance, Lx and its internal resistance, Rx. The Bridge parameters are R1 = 20,000 ohms, R2 = 50,000 ohms, C2 = 0.003 μf, ω= 105 radians per sec. C1 is adjustable from 10 pf to 150 pf, and R3 is adjustable from 0 to 10,000 ohms. At Balance,I. Derive expressions for Rx and Lx in terms of ω, R1, R2, R3, C1, and C2.II. Determine the largest values of Rx and Lx that are measurable with the given parameters.Norton’s Theorem1. Connect the circuit shown in the figure 2. Measure and record the current I passing through in the 50 ohm resistor.3. Remove the 50 ohm resistor from terminals c and d.4. Connect the ammeter to measure and record IN 5. Remove the power supply from nodes a and b and place a short-circuit conductor to replace the power supply between nodes a and b. 6. Using the digital multimeter, measure RN.7. Using the measured IN and RN, compute for the current passing through the 50 ohm resistor.10. For the computed values, compute for IN, RN and the current passing though the 50 ohm resistor, I’.In some situations it is necessary to replace part of an electrical circuit. However, this must be carried out following certain criteria. The main one states that tension and current intensity, in the sector where the replacement occurred, must remain constant.In this we have what is known as the Substitution Theorem. For example, suppose that the circuit below it is necessary to replace the parts between terminals A and B. This will occur putting in their place a voltage source and a resistor. Calculate voltage and resistance that they must present.
- You are required to analyze the operation of DC circuit shown in Fig.2 and apply Ohm’s law and Kirchhoff’s voltage and current laws to find all the Voltages (with the associated polarities) andcurrents (with the associated direction)for all resistors. (Show all steps, equations, and calculations). C)Your manager asked you to present an analysis for the scientific data related to DC circuit. Firstly, he asked you to replace V1 with open circuit and V3 with short circuit and do the following:a. Calculate the equivalent resistance, all currents and voltages.b. Connect the circuit in the Laboratory and fill the results in Table 2 (Show all calculations).Q4. The source current in the circuit shown is in Figure 3a) What impedance should be connected across terminals a,b for maximum average powertransfer?b) What is the average power transferred to the impedance in (a)?c) Assume that the load is restricted to pure resistance. What size resistor connected across a,bwill result in the maximum average power transferred?d) What is the average power transferred to the resistor in (c)?vDraw a simple block diagram for a 24V stand-alone residential PV system powering both DC and AC loads. Show PV array, inverter, battery bank, charge controller, and AC & DC loads. Show PV array modules wired together as 2 series and 4 parallel (2s x 4p) and show their polarity (+ and – terminals) charging a lead-acid battery bank wired 2s x 8p. Show all major components and conductor polarities. For overcurrent devices and disconnects in the appropriate conductor you can simplify in the appropriate leg and show and as a small combined block labeled: