Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
ambitious94:
--- Quote from: ~VIN1094~ on May 25, 2010, 07:17:36 pm ---As soon as the metal files off the stone it gets cooled .. hence the person doesnt feel anything .. It has a low thermal capacity meaning looses fast
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Thanks VIN, ur a blessing :P =D ;)
Vin:
--- Quote from: 33oomar on May 25, 2010, 07:19:35 pm ---please help in
q5 paper 1 may/june 2006
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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 ..
8T:
--- Quote from: Shazizzzle on May 25, 2010, 07:19:51 pm ---It's a steel ball. When a metal such as iron or steel is brought near a magnet, magnetism is INDUCED in it, i.e haphazard domains arrange, and the metal is always ATTRACTED. Thus, the steel ball, which is unmagnetised, will become magnetised, i.e will be ATTRACTED to the N pole.
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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 (:
Vin:
--- Quote from: ambitious94 on May 25, 2010, 07:25:57 pm ---Thanks VIN, ur a blessing :P =D ;)
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thanks ;) actually a typo .. i meant.. at the end "looses heat faster" ;)
the_grim_reaper:
--- Quote from: A@di on May 25, 2010, 07:02:19 pm ---nonono! haha, look, the current for the first round will move from positive to negative terminal , next, it will move from negative to positive, this keeps on happening..
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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????
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