Two inductors of 5 H and 4 H have a mutual inductance of 2.5 H between them. The coupling coefficient is
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- Two capacitors having values of 80 F and 60 F are connected in series. What is the total capacitance?Three capacitors having values of 2.2 F, 280 F, and 470 pF are connected in parallel. What is the total capacitance?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.7. The resistor in an R-L series circuit has a voltage drop of 53 V, and the inductor has a voltage drop of 28 V. What is the applied voltage of the circuit?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?
- Incandescent lighting of 500 W is connected in parallel with an inductive load. A clamp-on ammeter reveals a total circuit current of 7 A. What is the inductance of the load connected in parallel with the incandescent lights? Assume a voltage of 120 V and a frequency of 60 Hz.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?For 2 inductors LA and LB with values 150μH and 200μH.Calculate 1. Total inductance when LA and LB are in series without mutual coupling 2. Combined inductance of LA and LB when they are connected in parallel without mutual coupling 3. Value of coefficient of coupling
- A capacitor in series with a 20-KΩ resistance across a 10 V ac source. What size C is needed for equal voltage across R and Xc at frequency of 100 Hz and 100 KHz.An inductor of inductance of 0.4 H is connected in series to a resistor of 6 N and a 12 v battery. What is the energy stored in the inductor? O 0.8 J O 1.2 J O 1.8 J O 2.4 J> 4. A 50-mH inductor is connected in parallel with a 30-mH inductor. How much inductance must be connected in parallel with this combination if the total inductance is to be 0.01-H? 139