Capacitors of 10 μF, 20 μF and 30 μF are connected in series to supply 200 V d.c. Find the voltage across each capacitor if supplied.
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Capacitors of 10 μF, 20 μF and 30 μF are connected in series to supply 200 V d.c. Find the voltage across each capacitor if supplied.
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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.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.
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- A postage stamp mica capacitor has the following color marks starting at the upper left dot: yellow, violet, brown, green, no color, and blue. What are the capacitance value, tolerance, and voltage rating of this 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 22-k resistor and a 0.02-F capacitor are connected in series to a 5-V source. How long will it take the capacitor to charge to 3.4 V Select one: a. 0.501 ms b. 0.66 ms c. 0.44 ms d. 0.70 ms
- A 470- uF capacitor is connected in series with a 120-k2 resistor. How long will it take the capacitor to charge completely?Two series capacitors C1 and C2 are connected in series to a 24V battery. The dielectric for between the plates are K1=3.0 and K2= 4.0. Without any dielectric, capacitors C1 and C2 had equal capacitance of 5uF. What is the voltage across C2?3. A resistor and a capacitor are connected in parallel across a 120 V DC source. Determine the voltages across the resistor and the capacitor.