Find the total energy stored ( in units of mJ) in the group of capacitors shown below given that the potential difference Vab is equal to 19.4 V? 50 μF 10 μF by 20 µF
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- 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?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 find that a 25-F capacitor connected to 480 VAC is defective. The storeroom has no capacitors with a 480-VAC rating. However, you find two capacitors rated at 50 F and 370 VAC. Can these two capacitors be connected in such a manner that they can replace the defective capacitor? If yes, explain how they are connected and why the capacitors will not be damaged by the lower voltage rating. If no, explain why they cannot be used without damaging the capacitor.
- 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?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?What is the value of the induced voltage of the self-inductance when the rate of current is from 200 uA to 20 uA and the total time interval is 5 uS?
- Find the kinetic energy for an electron having total energy of -4eV in the third energy level. 8eV -8eV 4eV 2eV -4eV -2eVConsider the diagram of the following figure: Determine the charge voltage and energy of each of the capacitors. Make and complete your data table, if the voltage is 300 V C UF C₁= 30 C₂=60 C₁=22 C=74 Cs=32 Co=45 q μC V V W E 300 60μF 22HF C2 C3 30MF C1 CA 74 MF C5 32AF :C6 45MFThe cell in the circuit has an emf of 2.0 V. When the variable resistor has a resistance of 4.0 N, the potential difference (pd) across the terminals of the cell is 1.0 V. What is the pd across the terminals of the cell when the resistance of the variable resistor is 12 Q? A 0.25 V 0.75 V C 1.33 V D 1.50 V
- Solve the following values in figure 1.0. Total Capacitance, Ct. Total Charge, Qt. Individual Charge of C1 Individual Charge of C2 Individual Charge of C3The switch (SW) in the circuit is opened for a long time shown Figure 2. A. Calculate the expression of the current of inductor. B. find the value of the current of inductor at t-20 msec. 30 20 10 sa Figure 2The value of the Inductance can be determined by (W - is energy stored in inductor, I - current) O a. ½ W21 O b. 2W/ 12 O c. 2WI2 O d. 2W21