4. Three capacitors, C1 = 5 µF, C2 = 10 μF, and C3= 20 µF, are connected in parallel across a 150-V source. Determine: (a) the total capacitance, (b) the charge on each capacitor, and (c) the total energy stored in the parallel combination
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- 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.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?Using the series circuit in Figure 3 consisting of a voltage source V, the resistor R and the fully uncharged capacitor C, how to find the value of the capacitance C considering as known data the time constant of the circuit T and the value of the resistor R? V ww R
- For the circuit below, determine the current in each branch and the potential difference in the inductor immediately after switch S isclosed. After a long time the switch S is then opened. What are the currents in each branch and the potential difference in the inductor at that moment?An inductor is "charged" to some value, then connected in series with a 1002 resistor and allowed to "discharge". A measurement of the potential difference across the resistor is shown in the figure below. Compute the time constant of the circuit, the inductance of the inductor, and the initial current through the inductor. 12 10 8 6 Potential across resistor (V) 2 0 0 0.0001 0.0002 0.0003 0.0004 0.0005 0.0006 0.0007 time (s)1. Find the voltages across the following components (a and b) after 1 second. The Capacitor is initially charged at 10V while the voltage source is 1V. Resistor R is 103 ohm while capacitor C is 1mF. a. Capacitor C b. Resistor R c. What is the best 1st order DE Method applicable to this problem?
- Q19. For the series-parallel inductor circuit shown in figure B19, answer the following questions. L2 2mH 4mH L3 L4 SMHS 5mH 3.5mH L6 8mH L7 2mH L3 4.5mH e Figure B19 Determine the inductance, L3 value. ii) If E is the energy stored in inductor for current, Calculate the energy if the current value is increased twice.The parallel capacitor combination shown in the figure is connected across a 12 V source. Determine the following: a. equivalent capacitance Ceq b. the charge on the combination. c. the work needed to carry the charge across 1uF + 12V 3uF 2uF. In the adjacent figure each of the two capacitors mounted in parallel has a value C,the resistor has a value R, and the power supply has value ɛ= 25 V. Upon closing thekey S the charging process of the two capacitors starts. The initial value of the electriccurrent was I0 = 25 mA, as shown in the table below, then the electric currentdecreased until it vanished at . The table below shows the values of the electriccurrent every two seconds as measured by the ammeter A.a) Determine the value R of the resistor in k ohm units.b)Plot the I-t graph (electric current versus time).c)Determine the circuit constant time from the I-t graph.d)Determine the value C of each capacitor in micro F units.e)Complete the table by evaluating the electric charge q(t) on eachcapacitor at the moments .
- 3. For the R-C circuit in below figure, composed of standard values: a. Determine the time constant of the circuit when the switch is thrown into position 1. b. Find the mathematical expression for the voltage across the capacitor and the current after the switch is thrown into position 1. c. Determine the voltage Vc and current éc the instant the switch is thrown into position 2, t-1s. d. Determine the mathematical equation for voltage Ve and current zc for the discharge phase. R=4.7KO, C=56µF, E=22V + 'R 29 ve (a)The shown circuit is connected for a very long time with all capacitors were initially unchargod. The final charge on C and C2 are Q1 nd 02. respectively. You are given that C 2C2. Ey E and Ey- 17 E. Find the ratio QQ1. R Es5. An alternating current bridge is arranged as follows: The arm BC and DA consists of non-inductive resistance of 800 Q each. A balance is obtained when resistances of the arms DE and CD of non-inductive variable resistances of 200 N, 1k n respectively. The arm EC of a capacitor of 1 µF capacitance. The alternating current source is connected to A and C and the telephone receiver to B and E. Calculate the resistance and inductance of arm AB. Also find Q factor, when supply frequency is 1500HZ.