Ideal capacitors do not dissipate energy; they store it for use in the circuit. True False
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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?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?Fill in all the missing values. Refer to the formulas that follow. Resistance Capacitance Time constant Total time 150 k 100 F 350 k 35 s 350 pF 10 s 0.05 F 1.2 M 0.47 F 12F 0.05 s 86 k 1.5 s 120 k 470 pF 250 nF 100 ms 8 F 150 s 100 k 150 ms 33 k 4 F =RCR=CC=R Totaltime=5
- 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?Two capacitors are in series with a voltage source of 15 V. If the capacitors are rated at 10 μF and 5 μF respectively, calculate: Equivalent capacitance Equivalent charge, Q1 , and Q2 V1 and V2Capacitors are connected, one at a time, to the terminals of a 60-Hz, 12-V power source. Calculate the current through capacitors of capacitance 10-pF.
- Calculate the effective capacitance, in µF, of the following collection of capacitors. Blank 1 If a voltage source of 24.0 V is connected from top to bottom, what is the charge accumulated on the 3.5 µF capacitor, in µC, when fully charged? Blank 2A 20.0 μF capacitor, 25.0 μF capacitor, and a 50.0 μF capacitor areconnected in parallel to a 24.0 V battery. a) What is the equivalent capacitance of the combination?b) What is the charge on each capacitor?c) What is the potential difference across each capacitor?d) What is the energy stored in each capacitor?e) What is the total energy stored?. A 47,000 µF capacitor, initially charged to 100 V, is discharged by a steady current of 1 mA. How long does it take to discharge the capacitor to 0 V? a. Is this discharge time long or slow? Explain
- Two capacitors are in parallel with a voltage source of 15 V. If the capacitors are rated at 10 μF and 5 μF respectively, calculate: Equivalent capacitance V1 and V2 Equivalent charge, Q1 , and Q2#14 The "charge-holding" ability of a capacitor is called its capacitance. a True b False1.1 A capacitor which has an internal resistance of 10Ω and a capacitance value of 160uF is connected to a supply voltage given as v(t) = 100sin(314t) Calculate the peak current flowing into the capacitor