3) Obtain the relationships between terminal voltages and currents for each of the ideal transformers in the figures below. I1 1:n 1:n + (a) (b) 1:n 1:n V1 V2 V1 V2 (c) (d)
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- Consider the circuit shown in Figure Q7. The full-wave bridge rectifier is supplied from a transformer that has a secondary winding resistance of 52. When conducting, each diode has a forward voltage drop of 0.7 V, regardless of the current carried. D1 D4 240 V rms 50 Hz D2 D3 RL Figure Q7 (a) The transformer has a turn ratio of 10:1. Find the value of the load resistance, RL, if the peak voltage across the load is found to be 20.0 V. (b) For a load resistance of 50 2 and a transformer that gives a peak current in the load of 0.5 A, what is the power dissipated in the load? n:1Explain five (5) applications of the hall effects With the aid of a diagram, explain how a P-N Junction is form. iii. State five (5) application of PN Junction, and explain the property of the PN junction that make those application possible. Explain what carrier mobility is and elaborate on the factors that influence carrier mobility. A 80 V rms is stepped down to 18V rms by a transformer. The output from the transformer is rectified using a half wave rectifier circuit and connected to a 47.5 Ω load resistor. Draw a circuit diagram of this arrangement and the waveform at each stage. Calculate the following about the circuit in Figure 2.1 (If silicon diodes are employed in the rectification); the peak value of the output voltage considering the drop across each diode, the average voltage, iii. The current through the load resistor, The current diode, The frequency of the output signal, Calculate the efficiency of the full wave rectifier expressed in percentage. vii. Sketch…A full-wave rectifier is connected to a single-phase source and supplying an inductive load. For the sake of simplicity, you can assume that the ripple at the output current is negligible. Input specifications: The source is single-phase utility grid at 220 V and 50 Hz. Output specifications: The load resistance is 10 Ohm. Sketch the schematic of the system. Sketch the waveforms of the output voltage and current and the source voltage and current. Determine all the performance parameters.
- QUESTION 3 is dc -Lac 0 f(t) = Ide T If ripple-free load current in steady-state is assumed, the input current is waveform of the single-phase full-wave rectifier may then be depicted as shown in the figure above for an ideal input transformer. With the assumption that the supply is ideal and perfectly smooth and ripple free load current, which implies an infinitely large load inductance, it is quite straightforward to obtain an analytical expression for the input current harmonics. The rectangular wave is defined as de 270 when 0< t < π when_πConsider a 3-phase half-wave rectifier circuit shown in the figure. The source is a symmetrical, 3-phase four wire system. The line- to-line voltage of the source is 150 V and the supply frequency is 300 Hz. The ripple frequency at the output is R ER B N-In the circuit of figure Nº A, the secondary voltage Vs is 15 volts rms with a frequency of 60 Hz, R equal to 100 Ohms and C equal to 1000 microfarads. The diodes are silicon (Vd = 0.7 volts) and the Zener diode is 15 volts. Determine:a) The magnitude of the ripple voltage at Cb) The Magnitude of the Peak Inverse Voltage (PIV) for D1 and D2A diode circuit is given in the below figure, in which two diodes are connected in series and their saturation currents are Is1 =10-¹6 A and Is2 =10-¹4 A. If the applied source voltage is 1 V, calculate the currents IDI and ID2 and the voltage across each diode VDI and VD2. IDI Ī Vpl + D₂ VD2In the circuit of the following figure, the input voltage Vs is 15 volts rms with a frequency of 60 Hz, R equals 150 Ohms and C equals 100,000 Pico Farads. The diodes are Germanium (Vd = 0.2 volts) and the Zener diode is 12 volts. a) The magnitude of the ripple voltage at Cb) The Magnitude of the Peak Inverse Voltage (PIV) for D1 and D2.For the circuit in the figurea) Determine the time constant.b) Write the mathematical expression for IL, VL and VR, after the switch is closed.c) Determine IL, VL for one, three and five time constants.d) Draw the waveforms of IL, VL and VR.The Figure 2 shows an electronic circuit designed for supplying power to a load (R1). The supply voltage 235V (RMS, AC) at frequency of 50HZ. The required DC voltage and power for the load are 24V and 3.6 W respectively. The Electrical Components of this AC to DC converter are: A full-wave rectifier to convert AC voltage to DC voltage. A regulator with transistor and Zener diode to ensure a constant voltage and power for the load. D1 Iide 91 Vaut VLoad D2 D3 Vde VI sine R1 RL Regulate Reetifier Figure 2. Complete Circuit Assume that the diodes are real diodes (NOT ideal diodes). The following information is available: The collector to base resistor of the regulator R1 = 5.0 k The transistor Q1 with B value of 24 is used for the regulator circuit. Determine the following quantities for this electronic device and fill the table below: Question Answer The voltage of Zener Diode (Vz) The current in R1 The DC current into the regulator | (Idc) Base current of transistor (IB) Collector…I need to power a 15kw/20HP DC Motor with a rectified 24VDC from a step down transformer with input of 11A and output of 103A/12VAC -24VAC. What is the required Capacitance needed to ensure ripples are cleared and also gives a steady VDC of 24VDC to the DC Motor to run quite well. Please, all note that the rectifier is a full wave rectifier of 100A...is de (c) -Idc de 0 first 2 harmonics of b If ripple-free load current in steady-state is assumed, the input current is waveform of the single-phase full-wave rectifier may then be depicted as shown in the figure above for an ideal input transformer. With the assumption that the supply is ideal and perfectly smooth and ripple free load current, which implies an infinitely large load inductance, it is quite straightforward to obtain an analytical expression for the input current harmonics. The rectangular wave is defined as Ide K f(t)= By using the full range Fourier Series, compute the de when 0SEE MORE QUESTIONSRecommended textbooks for youIntroductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSONDelmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. 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