A 70 μF capacitor is fully charged by a 15 V battery. It is then disconnected form the battery and discharged thruh a 180 olhm resistor. If we define a capcitor to be fully discharged when ther is less than one elementary charge e on it, then how long does it take to fully discharge this capacitor?

A 70 μF capacitor is fully charged by a 15 V battery. It is then disconnected form the battery and discharged thruh a 180 olhm resistor. If we define a capcitor to be fully discharged when ther is less than one elementary charge e on it, then how long does it take to fully discharge this capacitor?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter20: Electric Potential And Capacitance

Section: Chapter Questions

Problem 43P

See similar textbooks

Similar questions

A large parallel-plate capacitor is attached to a battery that has terminal potential (Fig. 27.15A). After a period of time, the capacitor stores charge Q so that its top plate is positive and its bottom plate is negative, and the potential difference between the plates is VC = . An I-shaped neutral conductor consisting of two parallel plates connected by a wire is slipped between the plates of the capacitor so that all four plates are parallel (Fig. 27.15B). What are the charges q1, and q2 on the plates of the I-shaped conductor? What is the potential difference VC between the top and bottom plates of the capacitor?
(a) When a 9.00-V battery is connected to the plates of a capacitor, it stores a charge of 27.0 C. What is the value of the capacitance? (b) If the same capacitor is connected to a 12.0-V battery, what charge is stored?
When discharging a capacitor, as discussed in conjunction with Figure 21.39, how long does it take for the voltage on the capacitor to reach zero? Is this a problem?
In open-heart surgery, a much smaller amount of energy will defibrillate the heart, (a) What voltage is applied to the 8.00F capacitor of a heart defibrillator that stores 40.0 J of energy? (b) Find the amount of the stored charge.
Suppose that the capacitance of a variable capacitor can be manually changed from 100 pF to 800 pF by turning a dial, connected to one set of plates by a shaft from 0° to 180°. With the dial set at 180° (corresponding to C — 800 pF), the capacitor is connected to a 500-V source. After charging, the capacitor is disconnected from the source, and the dial is turned to 0°. If friction is negligible, how much work is required to turn the dial from 180° to 0°?
A capacitor of capacitance 220uF is connected to a 20V battery. After fully charging the capacitor, it is disconnected from the battery and is connected in parallel to an uncharged 470uF capacitor. Find: (a) the final voltage across both capacitors; (b) the charge on each capacitor.
A 0.8 µF capacitor is charged to 15 V. After charging, the capacitor is disconnected from the voltage source and is connected to another uncharged capacitor. The final voltage is 5 V. (a) What is the capacitance of the other capacitor? µF (b) How much energy was lost when the connection was made? µJ еВook
A 4.5 uF capacitor is charged to 200 V & the charging is removed. It is then connected in paralel with a second capacitor that is initially uncharged. The voltage of the combination is 91.5V. what is the capacitance of the 2nd capacitor?
A 2.1-µF capacitor is fully charged by a 6.0-V battery. Thebattery is then disconnected. The capacitor is not ideal andthe charge slowly leaks out from the plates. The next day,the capacitor has lost half its stored energy. Calculate theamount of charge lost.
A 20.0 mF capacitor is charged to a potential differenceof 800 V. The terminals of the charged capacitor are then connectedto those of an uncharged 10.0 mF capacitor. Compute the decrease in energy when the capacitors are connected.
Compact “ultracapacitors” with capacitance values up toseveral thousand farads are now commercially available.One application for ultracapacitors is in providing power forelectrical circuits when other sources (such as a battery) areturned off. To get an idea of how much charge can be storedin such a component, assume a 1200-F ultracapacitor isinitially charged to 12.0 V by a battery and is then disconnected from the battery. If charge is then drawn off the platesof this capacitor at a rate of say 1.0 mC /s, to power thebackup memory of some electrical device, how long (in days)will it take for the potential difference across this capacitorto drop to 6.0 V?
Cap-monster maze. In the figure, all the capacitors have a capacitance of 6.0 µF, and all the batteries have an emf of 10 V. What is the charge on capacitor C? (If you can find the proper loop through this maze, you can answer the question with a few seconds of mental calculation.) ÏI I İ TIH Ο 60 μC Ο 30 μC Ο 120 μC Ο 180 μC HAHAY HHHH I C I I I İ 3