When you discharge a capacitor through a resistor R = 92 , its potential difference decreases from its initial value of 21 V to 8 V within 2.91 s. What is the capacitance of the capacitor (up to 2 decimal places) in F?

When you discharge a capacitor through a resistor R = 92 , its potential difference decreases from its initial value of 21 V to 8 V within 2.91 s. What is the capacitance of the capacitor (up to 2 decimal places) in F?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter27: Capacitors And Batteries

Section: Chapter Questions

Problem 75PQ: Figure P27.75 shows four capacitors with CA = 4.00 F, CB = 8.00 F. CC = 6.00 F. and CD = 5.00 F...

See similar textbooks

Similar questions

A pair of capacitors with capacitances CA = 3.70 F and CB = 6.40 F are connected in a network. What is the equivalent capacitance of the pair of capacitors if they are connected a. in parallel and b. in series?
Given the arrangement of capacitors in Figure P27.23, find an expression for the equivalent capacitance between points a and b. Figure P27.23 Problems 23 and 24.
Find the charge on each of the capacitors in Figure P16.43. Figure P16.43
An arrangement of capacitors is shown in Figure P27.23. a. If C = 9.70 105 F, what is the equivalent capacitance between points a and b? b. A battery with a potential difference of 12.00 V is connected to a capacitor with the equivalent capacitance. What is the energy stored by this capacitor? Figure P27.23 Problems 23 and 24.
Assume a length of axon membrane of about 0.10 m is excited by an action potential (length excited = nerve speed pulse duration = 50.0 m/s 2.0 103 s = 0.10 m). In the resting state, the outer surface of the axon wall is charged positively with K+ ions and the inner wall has an equal and opposite charge of negative organic ions, as shown in Figure P18.43. Model the axon as a parallel-plate capacitor and take C = 0A/d and Q = C V to investigate the charge as follows. Use typical values for a cylindrical axon of cell wall thickness d = 1.0 108 m, axon radius r = 1.0 101 m, and cell-wall dielectric constant = 3.0. (a) Calculate the positive charge on the outside of a 0.10-m piece of axon when it is not conducting an electric pulse. How many K+ ions are on the outside of the axon assuming an initial potential difference of 7.0 102 V? Is this a large charge per unit area? Hint: Calculate the charge per unit area in terms of electronic charge e per squared (2). An atom has a cross section of about 1 2 (1 = 1010 m). (b) How much positive charge must flow through the cell membrane to reach the excited state of + 3.0 102 V from the resting state of 7.0 102 V? How many sodium ions (Na+) is this? (c) If it takes 2.0 ms for the Na+ ions to enter the axon, what is the average current in the axon wall in this process? (d) How much energy does it take to raise the potential of the inner axon wall to + 3.0 102 V, starting from the resting potential of 7.0 102 V? Figure P18.43 Problem 43 and 44.
Figure P27.75 shows four capacitors with CA = 4.00 F, CB = 8.00 F. CC = 6.00 F. and CD = 5.00 F connected across points a and b, which have potential difference Vab = 12.0 V. a. What is the equivalent capacitance of the four capacitors? b. What is the charge on each of the four capacitors?
What If? The two capacitors of Problem 13 (C1 = 5.00 F and C2 = 12.0 F) are now connected in series and to a 9.00-Y battery. Find (a) the equivalent capacitance of the combination. (b) the potential difference across each capacitor, and (c) the charge on each capacitor.
A circuit has a 51.2 pF capacitor, a 27.4 pF capacitor and a 71.1 pF capacitor in parallel with each other. What is the equivalent capacitance (in pico-Farads) of these three capacitors?
If it is required to store 32.9 μC of electric charge in a capacitor in an electric circuit, what should the capacitance of the capacitor be if a voltage supply can apply 4.0 V of voltage to the capacitor? Report the number in the unit of μF
Three capacitors of capacitance C1 1.35 иF, С2 %3 3.95 иF, and Сз 4.20 µF are connected in series. A potential difference of AVb 94.0 V is maintained by a battery. Find the equivalent capacitance of the series of capacitors and the charge on each capacitor. Сед Did you accidentally divide or take the inverse in your calculation? µF µC Determine the effect on the equivalent capacitance of reducing the second capacitance to 0.1 times its previous value. Ceq = HF
In the figure all the capacitors have a capacitance C=13.2μf. The voltage of the battery is V=29V. Determine the equivalent capacitance of the capacitor network (in uf). 3 hp 31
When connected in series, two capacitors have an equivalent capacitance of 1.60 µF. The same two capacitors have an equivalent capacitance of 14.0 µF when connected in parallel. What is the capacitance of each of the capacitors?