A series RC circuit with R = 5 k2 and C = 20 µF has a constant-voltage source of 100 V applied at t = 0; there is no initial charge on the capacitor. Obtain i, UR, VC, and q, for 1> 0. The switch in the circuit shown is closed at 1 = 0, at which moment the capacitor has charge Qo = 500 µC, with the polarity indicated. Obtain i and q, for t> 0, and sketch the graph of q. I kn so v 20 µF

A series RC circuit with R = 5 k2 and C = 20 µF has a constant-voltage source of 100 V applied at t = 0; there is no initial charge on the capacitor. Obtain i, UR, VC, and q, for 1> 0. The switch in the circuit shown is closed at 1 = 0, at which moment the capacitor has charge Qo = 500 µC, with the polarity indicated. Obtain i and q, for t> 0, and sketch the graph of q. I kn so v 20 µF

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?
A 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 Farads
3. A 10ohms resistor and an unknown inductance is connected in series. The series combination is then connected to a 10V DC source. After 1 sec the voltage measured across the inductor is 3V. Find the value the unknown inductance for this condition. Use the false- position method to determine L to a level of Es = 0.1%. Employ initial guess of x₁ = 6 and x₂ = 10
3. R1 = 6.0M2, R2 = 12.0M2, E = 12.0V. When the capacitor is completely discharged, open sl and close s2, it takes 66s to charge the capacitor to half full. Find the capacitance C. When the capacitor is completely discharged, close both switches, how long does it take to charge the capacitor to 70%? RI R2 1)
1) First part of the question: Two identical capacitors are connected in parallel and charged with a 20-V power supply as shown in the figure on the left. After the charges on the capacitors have reached their final values, the charge on each capacitor is 10 µC. Then the power supply is disconnected and a dielectric with K = 4 is inserted to fill the space between the plates of one of the capacitors. a) Find now the charge on the capacitor with dielectric. Give your answer in microcoulombs. Qo = 10 µC Qo = 10 µC| Q2 =? ► V = 20 V Battery
For 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)
When 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.
A variable capacitance and a resistance of 290 2 are connected in series across a 110-V; 60-Hz supply. Draw the complex or locus of impedance and current as the capacitance changes from 6uF to 32 µF. From the diagram, find (a) the capacitance to give a current of 0.6 A and (b) the current when the capacitance is 11 µF.
a) The current through a pure capacitor is given byi = 28.28cos(314t).Derive an expression for the voltage across the capacitor in the form v = Vm cos(wt) and comment on your answer. b)Estimate the value of the current I and the voltage V in each of the circuits shown in Figure QA1(c) and justify your method of estimation.
The following figure represents an RC-Circuit with the switch. In Figure A, the capacitor is initially uncharged. In Figure B, the capacitor is initially fully charged. 1) Draw and label the current direction immediately after the switch is closed for each figure. 2) Consider Figure A. What is the voltage across the capacitor as t → 0? Explain. 3) Consider Figure B. Is the voltage across the resistor increasing, decreasing or staying the same as t → 0? Explain. A) B) R C
Optional practice problems: 1) The figure below shows a parallel-plate capacitor that is connected to a battery (assume negligible resistance in the wires that connect the capacitor to the battery). a) While the battery is still charging the capacitor, rank the potential at points A-E, from lowest to highest BC D E b) After the capacitor is fully charged, rank the potential at points A-E, from lowest to highest. c) The battery is now disconnected from the capacitor and a piece of dielectric material is inserted between the plates. Is the potential difference between points A and E, than, the same as or larger than the potential difference across the battery? Explain your smaller reasoning
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.