Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Do ac to dc adapters draw current if nothing is plugged into them drawing current?
I'm a guitarist with a ton of these things plugged in and wondered if there's wear on the units if they are plugged in and not being used.
1 Answer
- waynebuddLv 61 decade agoFavorite Answer
Yes, but as the energy generated in the primary coil is not transferred to the secondary coil (it is an open circuit under such conditions), it actually fights current flow in the primary, thus reducing consumption to very little. Easy test: Feel a plugged in and connected adapter that has been working for several hours. It should be warm. Unplug the load, but leave the adapter in. The next day it should feel quite cool.
All this in layman's terms, of course! :-)
