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![[Post New]](/templates/default/images/icon_minipost_new.gif) 20 Jun 2007 22:16:02 IST
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Consider two uncharged spheres kept on the ground . Suddenly , some charge q is given to them . What is the force on one sphere by the other ?????
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Umang |
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21 Jun 2007 14:33:04 IST
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Zero because the charge will directly flow to earth (and because in the sphere the charges will not be static)
At least I think so.
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Being a genius is 1% luck and 99% perspiration........ |
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21 Jun 2007 18:20:55 IST
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since the spheres are kept on the ground...so their POTENTIAL becomes zero(not charge)....
make the potential of any sphere 0(assuming that the charge left on the sphere is x)...then u will get the amount of charge that is left on the sphere...now u can easily find the force....
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21 Jun 2007 18:22:31 IST
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kx/r + kq/d=0....where d is the distance b/w spheres which shud be given (acc. to me)...
F=kqx/d^2
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21 Jun 2007 22:45:08 IST
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You made the potential zero and yet charge remains on the sphere .How is it possible.
The potential of Earth always remains zero thus all charge flows to ground
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Being a genius is 1% luck and 99% perspiration........ |
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21 Jun 2007 22:48:25 IST
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I agree with 10904him !!
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Umang |
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21 Jun 2007 23:55:43 IST
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wat r u saying!!
when a body is earthed...its potential is 0 and not the charge...
u remember the problem when out of 3 concentric spherical ...two r earthed....we equate the pot. of the earthed sphere to 0...
i hope i m correct..
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21 Jun 2007 23:59:00 IST
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but that was bcoz of bound charge/(the charge induced by outer spere
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21 Jun 2007 23:59:29 IST
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i agree with 10904him
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22 Jun 2007 13:39:10 IST
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Neeraj decide when can the potential of a body be zero (sphere only.
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Being a genius is 1% luck and 99% perspiration........ |
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22 Jun 2007 13:43:35 IST
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But here also...charge is induced by the other sphere...
because of similarity...both will acquire same charge...
but since both spheres are earthed ....i think i may be wrong...
can anybody bring the perfect explanation of the Q....
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3 Jul 2007 13:13:27 IST
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hey hello..well i have read all the posts above and neeraj is correct..see its a general confusion ...whenever any two things r made in contact..whether in hydraulics or electrostatics or thermo the liquid..charge and heat flows respectively till pressure potential and temperature becomes same...so here when th two bodies r kept on ground so they r earthed..take for instance any one body and find its potential due to charges on both bodies..equate tht potential to zero...as far as static charge..see it depends on conducting and non conducting sphere..when nothing mentoned assume conducting
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a 2nd year IIT DELHI student, doing B.Tech in chemical engineering |
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3 Jul 2007 13:17:24 IST
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But wat will be the solution of this particular solution?
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