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Like to share videos with friends?
Automatically share your ratings, favorites, and more on Facebook, Twitter, and Google Reader with YouTube Autoshare.
Autoshare makes certain YouTube activities public on the services you choose. Select only the services you are comfortable with - like Facebook, Twitter, or Google Reader - to let your friends know what you like on YouTube. You can turn Autoshare off at any time.
whyy is it that the magnetic field around the wire a circle? what happens when two circular magnetic fields interact, (like in power lines) and why do they react like that?
Current flow is + to - in AC and DC. The difference in AC is the + and - reverse very quickly, 50 or 60 times per second, so the current also reverses back and forth with that frequency.
This Right Hand Curl Rule considers the conventional direction of current (+ to -) and not the real direction of current (- to +). So, you can just put your tumb pointing against the real current or just use your left hand instead.
Autoshare makes certain YouTube activities public on the services you choose. Select only the services you are comfortable with - like Facebook, Twitter, or Google Reader - to let your friends know what you like on YouTube. You can turn Autoshare off at any time.