2.1 A capacitor is constructed out of two 1€ coins facing each other in air at a distance of 0.5mm and connected to a voltagesource of Vs = 9V.Note: € is the symbol of the European currency as $ is the symbol of the US currency.The permittivity of vacuum is ε0 = 8.854-10-12 Fm'The relative permittivity of distilled water is εr = 80. What is the formula to find the energy stored in the capacitor?W = CV-2W = CV²○ W =(CV)²W = CV-2W = V²○ W = (CV)-2○ W = CV2○ W = V-2

W=21CV2Explanation:The energy stored in a capacitor can be calculated using the formula:…

Answered: A capacitor is constructed out of two…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter20: Capacitance In Ac Circuits

Section: Chapter Questions

Problem 2PA: You are working in an industrial plant. You have been instructed to double the capacitance connected...

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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 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?
All capacitors were initially discharged. at t = 0, S1 is placed at position 1 and S2 is closed. During this phase, it has been determined that Eth and Rth seen by the equivalent capacitor are, respectively, 16 V and 11.0 kΩ. The equivalent capacitor is 1.50 µF. Calculate the time constant for this phase. Enter your answer in ms rounded to 2 decimal places. At t = 15 ms, S1 is placed at position 2 and S2 is kept closed. At t = 25 ms, S1 is kept at position 2 and S2 is opened. Data: R1 = 5 kΩ, R2 = 4 kΩ, R4 = 3 kΩ, R5 = 18 kΩ, R6 = 12.5 kΩ;
A10,000μF capacitor has an asymmetric tolerance speciﬁcation of+20%/−50%.What is the possible range of values for this capacitor?F capacitor has an asymmetric tolerance speciﬁcationof+20%/−50%.Whatisthepossible range of values for this capacitor?
1. Calculate the capacitance between two parallel plates, each of which is 100 sq. Inches and 2 mm apart in air. 2. A capacitor is charged with 0.23 J of energy at a voltage of 48V. What is its capacitance? 3. A 50-uF capacitor is initially charged. Determine the initial charge of the 50-uF capacitor if the charge transferred to a 100-uF capacitor, when connected in parallel, is 200-uC.
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…
Inductance, Capacitance, and Mutual Inductance d.) Find the energy (in microjoules) stored in the inductor at 5 ms.e.) Find the maximum energy 9in microjoules) stored in the inductor and the time(in milliseconds) when it occurs.D and E only. Thank youuu
All capacitors were initially discharged. at t = 0, S1 is placed at position 1 and S2 is closed. At t = 15 ms, S1 is placed at position 2 and S2 is kept closed. During this phase, it has been determined that the total resistance seen by the equivalent capacitor is 28 kΩ; and that vT = 10 V at t = 15 ms. Calculate the value of the current iT immediately after the switching occurred. Enter your answer in mA rounded to 2 decimal places. At t = 25 ms, S1 is kept at position 2 and S2 is opened. Data: R1 = 6.5 kΩ, R2 = 10 kΩ, R3 = 1.0 kΩ, R4 = 4 kΩ, R5 = 20 kΩ, R6 = 11.5 kΩ; C1 = 4.5 µF, C2 = 4.0 µF, C3 = 12 µF
A capacitor is made up of two dialetric materials A and B of relative permitivity of 2.5 and 4 and thickness 1mm and 3mm respectively connected in Series.If the cross section of each dielectric is 500mm^2 determine the total capacitance. Secondly,If the a potential difference of 200V is applied across the composite dielectric, determine the voltage across each dielectric(Eo=8.854×10^-12F/m). Also determine the energy stored in capacitor
A 100-pF capacitor is constructed of parallel plates of metal, each having a width W anda length L. The plates are separated by air with a distance d. Assume that L and W are bothmuch larger than d. What is the new capacitance ifa. both L and W are doubled and the other parameters are unchanged?b. the separation d is doubled and the other parameters are unchanged from their initialvalues? c. the air dielectric is replaced with oil having a relative dielectric constant of 25 and theother parameters are unchanged from their initial values ?
3. A ceramic capacitor has an effective plate area of 5cm2 separated by 0.1mm of ceramic of relative permittivity of 100. Calculate the capacitance in microfarads. If the capacitor is given a charge of 1.5 µC what will be the potential difference (pd) between plates? & calculate the energy stored in it
(a) If the capacitor is initially uncharged with C = 8.50 µF and = 1230 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 785 V in 1.40 s. (b) If the capacitor is then discharged across the patient's torso with Rtorso = 1240 Ω, calculate the voltage (in V) across the capacitor after 4.50 ms.

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