of 2µF capacita
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A: Given figure:
Two capacitors A and B are connected in series across a 100V supply and it is observed that the p.ds across them 60V and 40V respectively. A capacitor of 2µF capacitance is now connected in parallel with A and the p.d across B rises to 90V. Calculate the capacitance of A and B in microfarads.
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- 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 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 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.
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- Please explain this question properly A capacitor has a reactance of 40 when operated on a 50 Hz supply. Determine the value of its capacitance. In a series R–L circuit the p.d. across the resistance R is 12V and the p.d. across the inductance L is 5V. Find the supply voltage and the phase angle between current and voltageShow that the voltage division rule for two capacitors in series as in the figureThree capacitors A, B and C are connected in series across a 200 V d.c. supply. The p.d.s. across the capacitors are 40 V, 32 V and 128 V respectively. If the capacitance of A is 8 µF a) what are the capacitances (µF) of B? b) what are the capacitances (µF) of C?