Compact "ultracapacitors" are with capacitance values up to several thousand farads are now commercially available. One application for ultracapacitors is in providing power for electrical circuits when other sources (such as a battery) are turned off.
Assume a 1200-F ultracapacitor is initially charged to 12.0 V by a battery and is then disconnected from the battery. If charges is then drawn off the plates of this capacitor at a rate of 1.0mC/s. say, to power backup memory of some electrical gadget, how long (in days) will it takes for the potential difference across the capacitor to drop to 6.0 V?
The Attempt at a Solution
9981319.4 seconds = 115.52 days