Recent content by lyy1992

Whoa, ok, I just skeptical on it, so I made a suggestion. Well, very obvious that the suggestion is wrong, you may simply ignore it. I got to study more about it. Sorry for nonsense reply, but I think it is possible.

That means the ball will move 15 seconds later after you pushed the rod? The force itself is also traveling at the speed of light?

I'm also very interested on Big Bang Theory before. I think that the Big Bang theory is neither correct nor wrong, but is the best way to explain the origin of the universe by now. I don't know how the point ball of space before the Big Bang can store so much energy that created all of us, but...

Oh, I see. So you means that the induced EMF in a moving conductor is actually the same as the change in magnetic flux linkage of the whole closed system, isn't it? I mean BLv=-(change in magnetic flux linkage)? Just a rough assumption as their product are the same, that is induced EMF, or maybe...

Then you will get used to it.

Well, actually radian is another form of expressing angles, just like degrees and both type of expressions are convertable, just like converting km/h to m/s and vice versa. Because of ω=change in angular displacement=angle traveled/ time, then ω=2Pi/t for standard expression. The...

Wow, very impressive. But I do not know much about books. Here is some useful links: "http://www.youtube.com/watch?v=Kz_W6sSoowo&feature=list_related&playnext=1&list=SPF688ECB2FF119649" You can view many demonstration from the prerecorded lecturing class. "http://www.khanacademy.org/#physics"...

Hi, recently I'm confused whether EMF will be produced by crossing the magnetic field or change in magnetic flux linkage. My teacher said that if there is a metal ring which is "submerged" completely in uniform magnetic flux, neither it moves vertically nor horizontally will not induce EMF...