Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
mdwael:
--- Quote from: Ivo on May 26, 2010, 03:29:30 pm ---Sorry for the rubbish diagram!
--- End quote ---
You saved my life! :)
Adzel:
--- Quote from: M'i'D'o on May 26, 2010, 03:49:39 pm ---hey everybody there is a question in paper 1 physics i was solving yesterday while studying...
a steel bar is hanged near an electromagnet....
A ( attract attract )
B ( attract repel )
C ( repel attract )
D ( repel repel )
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A ( attract attract )...Im very sure! ;)
WARRIOR:
--- Quote from: ang3l on May 26, 2010, 03:47:57 pm ---Thx..:D
Another thing...When does the wire/coil watever cuts the magnetic field..When it is vertical or horizontal ???
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it depends
it it cuts at both but maximum cutting is whn its horizontall ( whn voltage induceed is max ) ..it exactly stops cutting whn its prefectly VERTICAL ( this is whn teh voltage induced is 0 )
( motor affect ) of coil
Ivo:
--- Quote from: Adzel on May 26, 2010, 03:55:10 pm ---A ( attract attract )...Im very sure! ;)
--- End quote ---
Beware, it says steel...
NidZ- Hero:
an induced current always flow in de direction such that it opppose the change which produced it this de is de law
explanation
if a magnet is moved in or out of a coil a current is induced in de coil lke if de induced current turns the coil into a weak electromagnet whose N pole opposses de approachin N pole of de magnet when de magnet is induced is pulled out of de coil the induced current alters de dirtection and de poles of de coil r reversed then de de tmme de coil attract de magnet as its pulled away. so once again de the change is opppoesd
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