help A2 physics

[sis muslimah]

Assalamualaikum

can anyone explain lenz's law to me? the definition that i have to learn is confusing me

 

[tango92]

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

so the magnet goes through the coil normally

 

[sis muslimah]

^^^ ahhh makes things much clearer jazakallahu khair brother

 

[إحسان]

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

 

[sis muslimah]

^^^ jazakallahu khair sis the spec that im doing theres no revision site for it inshallah this will b useful =)

 

[tigerkhan]

lol. it remind me of college days. i love sciences esp physics.

 

[GodIsAll]

Physics gives me dain bramage.

 

[sis muslimah]

lol. it remind me of college days. i love sciences esp physics.

: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

 

[SorayaCali]

Physics has too much mathematics for my taste

 

[Ğħαrєєвαħ]

Physics gives me dain bramage.

I believe you meant 'Brain damage'..

 

[sis muslimah]

^^^lol

 

[Serendipity]

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.

 

[sis muslimah]

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

 

[GodIsAll]

Originally Posted by GodIsAll
Physics gives me dain bramage.
I believe you meant 'Brain damage'..

I typed in what I meant to...:giggling:

 

[GodIsAll]

I'm going to be doing a level physics but I'm starting to regret it. Is really hard? And is the mathematics difficult?

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.

 

[sis muslimah]

I had to suffer through a 5 hour physics course during undergraduate from my BS in Biochem.

you had to do physics in biochemistry :/ i thought it was just biology and chemistry i was panning to do it but changed my mind

 

[GodIsAll]

Yes indeed...one course in physics was required...5 hour course ...and I loathed every moment of it.