When the capacitor is fully charged, how much energy does it store (in Joules, 2 sig figs)? How long does it take to charge the capacitor to 90% capacity?
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When the capacitor is fully charged, how much energy does it store (in Joules, 2 sig figs)?
How long does it take to charge the capacitor to 90% capacity?
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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?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.An AC electric motor is connected to a 240-V, 60-Hz source. A clamp-on ammeter with a peak hold function reveals that the motor has an inrush current of 34 A when the motor is first started. Your job is to reduce the inrush current to a value of 20 A by connecting a resistor in series with the motor. The resistor will be shunted out of the circuit after the motor is started. Using an ohmmeter, you find that the motor has a wire resistance of 3 . How much resistance should be connected in series with the motor to reduce the starting current to 20 A?
- A 10-ohm resistor and 10 H inductor are connected in series across a source of 12 V. If the current is initially zero, find the current at the end of 5 ms.The following question isreferring to the concept of currents and potentialdifference in circuits consisting of batteries, resistorsand capacitors. Solve for the unknown quantities.(a) calculate the current that flows in the circuit, (b) calculate the potential difference between point a and b in the figure and (c) identify which point is at the higher potential.For a series RL circuit supplied from a voltage source, discuss in details how the resistance affects the circuit current response. Support your discussion with numerical illustrations (both equations and plots) assuming inductance of 0.5 H and supply voltage of 100 Use suitable values of R (on your choice)
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