10. A 20 µF in an audio amplifier circuit produces a voltage drop of 5V at 1 2 points kHz. Find the current passed by the capacitor. * Your answer 11. What is the inductance of the coil whose resistance is 100 Q if it draws 2 points 0.55 A from a 110 V. 60 Hz power line? * Your answer
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- Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 - Hz power line. An ammeter indicates a circuit current of 8.6 amperes. How much current is flowing through the 40F capacitor?A 15-F AC capacitor is connected in series with a 50 resistor. The capacitor has a voltage rating of 600 WVDC. The capacitor and resistor are connected to a 480-V, 60-Hz circuit. Is the voltage rating of the capacitor sufficient for this connection?You are working in an industrial plant. You have been instructed to double the capacitance connected to a machine. The markings on the capacitor, however, are not visible. The capacitor is connected to 560 volts and an ammeter indicates a current of 6 amperes flowing to the capacitor. What size capacitor should be connected in parallel with the existing capacitor? What is the minimum AC voltage rating of the new capacitor? What is the minimum DC voltage rating of the new capacitor? What is the minimum KVAR size that can be used in this installation?
- What frequency must be applied to a 33-mH inductor to produce an inductive reactance of 99.526 ?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.You are a journeyman electrician working in an industrial plant. Your task is to connect an inductor to a 480-V, 60-Hz line. To determine the proper conductor and fuse size for this installation, you need to know the amount of current the inductor will draw from the line. The nameplate on the inductor indicates that it has an inductance of 0.1 H. An ohmmeter reveals that it has a wire resistance of 10 . How much current should this inductor draw when connected to the line?
- Which of the following is not a requirement for an electric circuit? a. a source b. a path c. a load d. a signal lightAC 15. What would the equivalent resistance be of a 159 uF capacitor? 16. What is the RMS voltage of a circuit if the peak voltage is 170 volts? 17. If the RMS voltage is 240 volts AC, what is the peak voltage? 18. What is the formula for finding an inductors equivalent resistance? 19. What is the equivalent resistance of an inductor with 0.17 henrys? 20. What is the symbol of an AC power source? 21. What is the equivalent inductance of a parallel circuit with a 0.01L, 0.02L, and 1.7L inductor? 22. What is the equivalent inductance of a series circuit with a 0.03L, 0.04L, and 1.6L inductor? 23. A transformer with a primary voltage of 480 volts and a turns ratio of 2:1 will have what secondary voltage? 24. A Power Network is comprised of what three components? 25. What is the main difference between a fuse and a circuit breaker?Ans.a) 79580/Hb)1mH/m Problem: 2.6.12. A galvanometer has a coil resistance of 50 ohms and a current sensitivity of 0.001 micro-ampere per mm. How much is the voltage across its terminals when the deflection is 15 cm at full scale? Ans. 7.5µ V Problem: 2.6.13. A 40-F capacitor is charged to store 0.2 J of energy. An uncharged 60-µF capacitor is then connected in parallel with the first one through perfectly conducting leads. What is the final energy of the system? Ans. 0.12J Problem: 2.6.14. A 40-uF capacitor is connected in parallel with a 60-µF capacitor and across a time-varying voltage source. At a certain instant, the total current supplied by the source is 10 A. Determine the instantaneous currents through the individual capacitors. Ans. 4A and 6A
- 10 V sine 90 kHz 1 kQ C1 1 nF 2. Using a Square function with 90,000 Hz in your function-generator, a 1000-ohm resistor, and a 1 nano-Farad capacitor, determine the charging time for the capacitor. Show your calculations and show the charging-discharge curve with an oscilloscope in TINKERCAD.low voltage systems What is the general reason for selecting the capacitor voltage with a value greater than 400 V (such as 415,445 V) in Reactive Power Compensation? a) Reduce losses b) Harmonics C)Current decrease d) Voltage dropA series circuit consists of a resistor, a coil, and a capacitor connected across a 300 V, 60 Hz AC source. THe current drawn is 20A. The voltage across the resistor is 60 V, that across the coil is 260 V and that across the capacitor is 100V. The resultant voltage across the coil and the capacitor is 254.56 V. Determine (a) the resistance of the resistor, (b) the resistance and inductance of the coil, and (c) the resistance and capacitance of the capacitor.