A potential difference AV is applied across the combination of capacitors shown in the figure, where C1=3.0 µF and C2=6.0 µF. Whichstatement(s) in what follows is/are correct?AVI: The energy stored in C1 is greater than that stored in C2.II: The voltage across C1 would be higher if C¡ had a dielectric material K] between its plates.III: The equivalent capacitance is increased if two dielectrics (of K1 and K2) are, respectively, inserted in Cj and Cɔ.O I and IIO I and IIIO || and IIIO III only.O None of the options above.

The voltage across the series capacitors are calculated as Vc1=∆V*93=3∆VVc2=∆V*96=1.5∆V

A potential difference AV is applied across the combination of capacitors shown in the figure, where C1=3.0 µF and C2=6.0 µF. Which statement(s) in what follows is/are correct? AV I: The energy stored in Cj is greater than that stored in C2. II: The voltage across Cj would be higher if C1 had a dielectric material Kj between its plates. III: The equivalent capacitance is increased if two dielectrics (of K1 and K2) are, respectively, inserted in C1 and C2. O I and II O I and III O || and III O II only.

A potential difference AV is applied across the combination of capacitors shown in the figure, where C1=3.0 µF and C2=6.0 µF. Which statement(s) in what follows is/are correct? AV I: The energy stored in Cj is greater than that stored in C2. II: The voltage across Cj would be higher if C1 had a dielectric material Kj between its plates. III: The equivalent capacitance is increased if two dielectrics (of K1 and K2) are, respectively, inserted in C1 and C2. O I and II O I and III O || and III O II only.

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 5PP: Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 -...

See similar textbooks

Similar questions

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?
Given the capacitance of four capacitors Ca= 30 µF, Cb = 10 µF, Cc = 40 µF and Cd = 12 µF. If Cb and Cc are connected in series and the series combination is connected in parallel with Cd then the whole combination is connected in series with Ca, Calculate (a) the equivalent capacitance (b) the voltage across each capacitor if the circuit is supplied by 250 volts DC source (c) the charge on each capacitor.
A ceramic capacitor is to be constructed to have a capacitance of 0.01µF and to have a steady working potential of 2.5 kV maximum. Allowing a safe value of field stress of 10 MV/m, determine (a) the required thickness of the ceramic dielectric, (b) the area of plate required if the relative permittivity of the ceramic is 10, and (c) the maximum energy stored by the capacitor.
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
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, 19 V and 3.5 kΩ. The equivalent capacitor is 1.50µF. Calculate the value of the current iT immediately after the switching occurred. Enter your answer in mA 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 = 6 kΩ, R4 = 5 kΩ, R5 = 16 kΩ, R6 = 12.5 kΩ;
27. A phasor can be represented or expressed in either rectangular form (x +j y) or polar form (z cis n) True False 28. By convention, values obtain from time domain representation are always real while in phasor domain representation, values are generally expressed in complex form. True False 31. Value of capacitance is usually affected by the following physical dimensions and construction of a capacitor: such as number of turns, its length, its cross-sectional area and the permeability of the core. True False
A paper dielectric plate capacitor is to be experimentally tested. The metal plates and the paper material between said plates are all 20 cm in radius and subjected to 10V dc in the test. How much is the capacitance does this capacitor have in picofarads (pF), if the paper material between plates used is 2 cm thick? Input answer in 4 decimal places and in pF. Note: Relative permittivity of the paper ( εr ) : 0.4225
A 500 ohm resistor, an 1.5 F uncharged capacitor, and a 6.16-V emf are connected in series. (a) What is the initial current? (b) What is the time constant? (c) What is the final voltage on the capacitor? (d) what is the final charge on the capacitor? What is the final energy stored in the capacitor? (e) Express (i) Current in the circuit, (ii) Voltage on the capacitor, (iii) Charge accumulated on either plate of capacitor, (iv) energy stored in the capacitor as a function of time. (must include all the value calculated in the earlier part). (f) What is the i) current ii) charge on capacitor, iii) voltage on capacitor & iv) Energy stored in the capacitor after one time constant?
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 ?
24 A capacitor with air between its plates is connected to a potential difference of 12 V and stores a charge of 51.24 C. If the capacitor is removed from the source in a loaded state and a piece of paper is placed between its plates, what will be the new capacitance of the capacitor? (Paper=3.7) A) 11,1 F B) 3,3 F C) 20 F D) 15,8 F E) 7,2 F
A series RC circuit is not switched on and the initial state charge of capacitance ?CO = 10 V. In the circuit voltage source E = 50 V DC. Resistance R = 44 Ω and capacitance C = 100 μF. Give the answers to two decimal places. a) Give time constant Tau of circuit (ms) b) Calculate current after the switch k is closed at the moment t = 0.2 ms. (A) c) Calculate current after the switch k is closed at the moment t = 2*Tau. (A)
Between the plates of a capacitor with an area of A = 40 cm², and distance between the plates of d = 30 cm, three dielectric materials are placed, as shown in the following figure. what is the equivalent capacitance of the capacitor with the three dielectric materials with permittivities ε1= 0.20 F / m, ε2=0.30 F / m, ε3= 0.40 F / m ? a) 3,7mF b) 6,7mF c) 9,7mF d)10mF e)none of the alternatives