Capacitors and Inductors 1. Under DC conditions, calculate the voltage in the capacitor and the current in the circuit inductor, which charge the capacitor has stored, and calculate the energy in the inductor and capacitor. What energy the current source delivers. ? iL 10 A 6 H m 6Ω 222 + VC 4 F
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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 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 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)
- A capacitor can be used .............................................. in electrical circuits. Which of the followings fit? To regulate the currents To regulate the voltages To store energy by deposition of electric charges To provide energy as passive circuit element To store energy in the form of magnetic field To create time varying voltages and currents To dissipate energy To convert elektrik energy into heat or lightA 20-ohm resistor and a capacitor are connected in series with a battery of 60 volts. At t = 0, there is no charge on the capacitor. Find the capacitance if the current at t = 5 seconds is 3/e^s amperes. Ans. 0.05 FaradsWhen the capacitor is charged current flows on either side of the capacitor. Do electrons cross the gap to allow the current on the other side of the circuit?(b) Is charging and discharging time of capacitor equal in a theoretical RC circuit?Plase explain your answer by using relating formula.
- Fill in the blanksadd, capacitance, charge capacity, dielectric, dissipate, electrical circuits, , passive, plates,proximity, storesA capacitor is a 1 …………. two-terminal electrical component that 2 ……… potential energy in anelectric field. The effect of a capacitor is known as 3. …………... While some capacitance exists betweenany two electrical conductors in 4. …………… in a circuit, a capacitor is a component designed to 5.…… capacitance to a circuit. The capacitor was originally known as a condenser.The physical form and construction of practical capacitors vary widely and many capacitor types are incommon use. Most capacitors contain at least two electrical conductors often in the form of metallic 6.………… or surfaces separated by a 7. ………medium. A conductor may be a foil, thin film, or anelectrolyte. The nonconducting dielectric acts to increase the capacitor's 8. ………… ………. Materialscommonly used as dielectrics include glass, ceramic, plastic film, paper, mica, and oxide…a) With switch J2 open, close switch J1. Estimate the time it takes to do it. Obtain the equations for the voltage and current of the capacitor. Determine the energy stored by the capacitor. b) Open switch J1, close switch J2. Estimate the time it takes to do it. Obtain the equations for the voltage and current of the capacitor.A resistor and a capacitor are connected in series with a variable inductor. When the circuit is connected to a 240 – V, 50 – Hz supply, the maximum current given by varying the inductance is 0.5 A. At this current, the voltage across the capacitor is 250 V. Calculate the values of (a) the resistance, (b) the capacitance, and (c) the inductance. draw circuit diagram
- a) Equivalent capacitance Ceq of the combination shown in figure. b) The charge net charge stored by Ceq. c) Stored charge of capacitor C2 and C6For a given RC charging circuit with R 82KOhms, C 150UF and Vs 18 V, i. Calculate the capacitor charging voltage at t- ii. Specify the charging current at 2T where T= RC. iii. Explain the effect in the charging period if the value of R is doubled with the capacitance value of C kept constant. Prove your answer by computing the resulting full-charge periods when R is 82KOhms and when R is doubled with C kept constant. %3D (1 mark) (1 mark) 3D3T. (2 marks)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?