Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Dana:
--- Quote from: Ivo on May 26, 2010, 11:18:16 am ---Please please can someone clarify thins, thanks!
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I didn't really understand everything you said but yes to magnetise a material you wound a coil over it and pass a d.c. through the coil. And yes iron is magnetically soft thus loses magnetism easily and is used as the core of an electromagnet.
Umm what else? Ferrous substances are the ones that have alot of Iron.. I dno if ALL of them can be magnetised though
hope I helped
Ivo:
--- Quote from: Dana on May 26, 2010, 11:22:22 am ---I didn't really understand everything you said but yes to magnetise a material you wound a coil over it and pass a d.c. through the coil. And yes iron is magnetically soft thus loses magnetism easily and is used as the core of an electromagnet.
Umm what else? Ferrous substances are the ones that have alot of Iron.. I dno if ALL of them can be magnetised though
hope I helped
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So what's the difference between magentic induction and magnetising magnet then? Like passing through dc and stuff
Dana:
--- Quote from: deadman786 on May 26, 2010, 11:20:34 am ---The great city of Riyadh lol. With Minarat-ar-Riyadh as my centre and an invigilator who scares the heck out of me evrytime I see him. You should never try to know how easy or hard a paper was. If it was easy, you'll get over-confident. If it was hard, you'll already be freaked out and u'll screw you're grade. Besides, it's a different varient too so it's useless to find out if the other varient was easy or hard...
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Ahh yes I used to live in Riyadh now I live in Khobar. How is it there?
Haha we have a pretty > >:( invigilator too. Gives the dirtiest looks you'll ever see -.- Almost got kicked out of my bio exam cuz i forgot my statement of entry ::)
Yeaa I guess, but usually variants are pretty similar in paper 1. I dno I still love to know whether it was easy or difficult
where ru from?
Ghost Of Highbury:
--- Quote from: Ivo on May 26, 2010, 11:24:32 am ---So what's the difference between magentic induction and magnetising magnet then? Like passing through dc and stuff
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magnetising magnet.........??? huh?? didnt get u
Dana:
--- Quote from: Ivo on May 26, 2010, 11:24:32 am ---So what's the difference between magentic induction and magnetising magnet then? Like passing through dc and stuff
--- End quote ---
Magnetic induction is when you magnetise a metal by bringing another magnet close to it but not touching I think. And when you take it away it's not a magnet anymore. Magnetising is more permanent I guess. And can be done by electricity, hammering etc
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