Consider the series RC-circuit shown below for which R-83.5 kn, C-36.5 μF, and & 36.0 V. Find the following. 0 (a) the time constant of the circuit (b) the charge on the capacitor one time constant after the switch is closed
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- You are an electrician working in an industrial plant. You discover that the problem with a certain machine is a defective capacitor. The capacitor is connected to a 240-volt AC circuit. The information on the capacitor reveals that it has a capacitance value of 10 mF and a voltage rating of 240 VAC. The only 10-mF AC capacitor in the storeroom is marked with a voltage rating of 350 WVDC. Can this capacitor be used to replace the defective capacitor? Explain your answer.C'uk Converter Design A C'uk converter has an input of 12 V and is to have an output of - 24 V supplying a 60 W load. Select the duty ratio, the switching frequency, the inductor sizes such that the change in inductor currents is no more than 12 percent of the average inductor current, the output ripple voltage is no more than 1.5 percent, and the ripple voltage across C1 is no more than 3 percent.Boost Converter Design A boost converter is required to have an output voltage of 8 V and supply a load current of 1 A. The input voltage varies from 2.7 to 4.2 V. A control circuit adjusts the duty ratio to keep the output voltage constant. Select the switching frequency. Determine a value for the inductor such that the variation in inductor current is no more than 40 percent of the average inductor current for all operating conditions. Determine a value of an ideal capacitor such that the output voltage ripple is no more than 2 percent. Determine the maximum capacitor equivalent series resistance for a 2 percent ripple.
- Three capacitors 6, 10 and 15 uF are connected in series across a 100 volt supply. Find the voltageacross the 10uF capacitor.Make a clamper circuit using 500 µF capacitor, silicon diode, and a 100 KΩ resistor connected to a 10 Vpeak sine wave. Draw the output waveform and indicate the amplitude and the time values supported by your solutions. Do these for both positive and negative clamper circuit. Show your circuits first before your solutions and waveforms.A step down converter is operated with a duty cycle of k = 0.75. The input voltage is Vs = 20V, and the load is: L = 5mH, R = 1502. The minimum inductor current is I₁ = 0.1A. The maximum inductor current is: Select one: a. 1.9 A b. None of these OC. 0.9 A O d. 1.1 A Oe. 2 A
- 4- Design a boost converter that will have an output of 60 V from a 24-V source. Design for continuous inductor current and an output ripple voltage of less than one percent. The load is a resistance of 50 2. Assume ideal components for this design. VL ooooo ip - ^The magnitude of the voltage applied to the electrodes of a welding machine can be adjusted in the circuit below. In the range of minimum and maximum value that variable value resistor can take What is the time interval that the capacitor will charge from 0 to 8 V?Sketch output waveform the following CLIPPER circuits. Please show your solutions/analysis. 20 V 2V ldeal I ka -5 V (a)
- A series R–L–C circuit comprises a 5µF capacitor, a 4ohm resistor and a variable inductance L. The supply voltage is 10∠0◦ V at a frequency of 159.1 Hz. The inductance is adjusted until the p.d. across the 4 ohm resistanceis a maximum. Determine for this condition (a) the value of inductance, (b) the p.d. across each component and (c) the Q-factor of the circuit.Design a Cuk converter that has an input of 25V and the output of -30V. The load is 60W. Specify the duty ratio, switching frequency, inductor values and capacitor values. The maximum change in inductor currents must be 20 percent of the average currents. The ripple voltage across capacitor C1 must be less than 5 percent, and the output ripple voltage must be less than 1 percent.Buck Converter Design Power supplies for telecommunications applications may require high currents at low voltages. Design a buck converter that has an input voltage of 3.3 V and an output voltageof 1.2 V. The output current varies between 4 and 6 A. The output voltage ripple mustnot exceed 2 percent. Specify the inductor value such that the peak-to-peak variation in inductor current does not exceed 40 percent of the average value. Determine the required rms current rating of the inductor and of the capacitor. Determine the maximum equivalentseries resistance of the capacitor.