If the current through 10mH inductor increases from zero to 2 A, how much energy is stored in the inductor Select one: O O O O a. 20 m b. 5mJ c. 10mJ d. 40 mJ
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- 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?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?
- 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?Q5: Two capacitors (2#F, 8 #F) are connected in series across 100 volt. Then these capacitors are connected in parallel. How much the charge for two cases. 06: Capacitor 20 HF is connecting with 55 volt, 50 Hz. Calculate the current for the capacitor. When this capacitor is connecting with 10 volt, 50 Hz. How much is the current.The 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 2
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