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 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?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?
- A capacitor uses air as a dielectric and has a capacitance of 3 F. A dielectric material is inserted between the plates without changing the spacing, and the capacitance becomes 15 F. What is the dielectric constant of this material?The inductance between two points is 100 H. What is the voltage of the inductor after 10sec, if the measured current is 100 A?The unit of capacitance is in Farad (F). One farad is equal to one coulomb per volt. If the capacitor is rated 10pF and is connected to an 8V dc battery, how much energy can it store? Enter in your answer in two decimal places and in pJ.
- What voltage ?V is produced by a 20 μH inductor if the time rate of change of the current is 63 mA/s? ?=VA current of 5 A is supplied to a 400W discharge lamp at upf. Find the inductance of the coil required to function the lamp to work on 250V ,50 Hz. Write the answer in 2 significant digits.An electrical circuit contains a capacitor of 11.24 microfarads and a resistor of 1124 ohms. If the capacitor is fully charged, and then the voltage is interrupted, in how much time will about 63% of its charge be transferred to the resistor?
- Solve for the value of the capacitance (in nF unit) if R2 = 1035 ohms and Xc = 2132 ohms. Round your answer to 2 decimal places.Charging a 100mF capacitor in series with a 10000W resistor, using emf E=5v. a) how long after voltage is applied does Vcap(t) reach 4 voltsb b) what's the current through R at t=2sec.If the current flowing through a 75 mH inductor has the waveform shown, what is the voltage at t = 2.5s?