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ALL PHYSICS DOUBTS - POST HERE !!
Vin:
--- Quote from: 8T on May 25, 2010, 07:27:54 pm ---You mentioned that it is attracted to N which means south pole of the ball is attracted..
Main question why not A??
Thanks 4 the effort (:
--- End quote ---
See its a metal ball .. it doesnt hav a pole until another magnet 'sticks' to it .. S or N .. doesnt matter for the ball
Shazizzzle:
--- Quote from: 8T on May 25, 2010, 07:27:54 pm ---You mentioned that it is attracted to N which means south pole of the ball is attracted..
Main question why not A??
Thanks 4 the effort (:
--- End quote ---
See, the ball is UNMAGNETISED.
When it is exposed to N of magnet, that side automatically gains the S pole.
Thus, it ATTRACTS to the North.
In A, however, the ball is deflect downwards. That would mean it is repelling, which it is NOT.
Unlike poles attract!
33oomar:
--- Quote from: ~VIN1094~ on May 25, 2010, 07:26:28 pm ---Answer is B for the simple reason because umm .. lets start from A .. 1 g, 1 g, 5 g, 10 g .. no matter where u place them 5 g, 10 g spoil the broth :P
B- 1 g, 2 g, 2 g, 5 g .. u can place 1 g, 2 g, 2 g on one side and 5g on the other to balance .. try the others u wont get them ..
--- End quote ---
Oh i got it now :-\
Thanks a lot Homie
Vin:
--- Quote from: deadman786 on May 25, 2010, 07:28:32 pm ---
hahaha thanks!!!!!!!! U're a life saver. Just 1 final thing, this explains why a capacitor won't charge with AC cause it will prevent accumulation of charges right?? Meaning it will charge and discharge??? And to produce an induced EMF, is it necessary to use an alternating field (the one provided by AC)?? Since DC will not produce an alternating field and no induced EMF right????
--- End quote ---
ok u said "a capacitor won't charge with AC cause it will prevent accumulation of charges right??" PERFECT!
" Meaning it will charge and discharge" i dont think it will charge on the first place because the to and fro is so fast tht the capacitor wont be able to have enough time to get charged .. ;)
" And to produce an induced EMF, is it necessary to use an alternating field (the one provided by AC)?? Since DC will not produce an alternating field and no induced EMF right????" yup this is right .. do you know WHY ac is needed for induced pd ??
8T:
--- Quote from: Shazizzzle on May 25, 2010, 07:31:49 pm ---See, the ball is UNMAGNETISED.
When it is exposed to N of magnet, that side automatically gains the S pole.
Thus, it ATTRACTS to the North.
In A, however, the ball is deflect downwards. That would mean it is repelling, which it is NOT.
Unlike poles attract!
--- End quote ---
oH.. I didnt know it automatically gains S pole .
Many Thanks.
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