suppose you pushed a magnet into a coil of wire. this induces a current in the wire due to a change in the magnetic field of the wire
but this current induces its own magnetic field - suppose this magnetic field acted to pull the magnet in even faster - then this scenario happens
clearly energy is being created for nothing here - so that violated conservation of energy. - therefore the induced current must oppose the change in magnetic field caused by the moving magnet.
basically the direction of the induced current is in a direction that induces a magnet field opposing the original change. - you can find the direction using the left hand or right hand rule, i cant rememberwhich
I don't do physics, I'm quite horrible at it but I thought I'd give you a site I usually go on which is really popular among UK students. The Student Room
^ There's so many sections, from A-Levels to Unis etc and of course degrees, subjects (in your case Physics), and there's even a Islamic Society
:wa:
no way i mean physics is interesting some of the times, i only like particle physics and mechanics unfortunately not enough of these topics in my syllabus, my fav science has to be chem and human biology so much more interesting
I'm going to be doing a level physics but I'm starting to regret it. Is really hard? And is the mathematics difficult? Because I just don't particulary like maths that much. I just needed two science a levels.
its not too hard actually, i actually like the maths stuff hehe find it easier it depends on what spec your doing im doing AQA Physics B (which has less maths) but not many people do that spec but i think id prefer doing physics A in my opinion physics is secound hardest a level science
I had to suffer through a 5 hour physics course during undergraduate from my BS in Biochem.
Hated it. I didn't mind the mathematics, that's the easy, fun part. The thing that drove me nuts was getting the right data into the right equation. I am missing a nueron or two in that area of my brain.
