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Cool goIITian

Joined: 26 Mar 2009
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3 Jul 2009 14:30:49 IST
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a charge q is placed ina spherical cavity made in a positively charged sphere . The centres of spher
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a charge q is placed ina spherical cavity made in a positively charged sphere . The centres of spheres and cavity are displaced by a smalll distance I . force on the charge q is :


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Cool goIITian

Joined: 26 Mar 2009
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3 Jul 2009 14:32:38 IST
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ans to options are : a) in radial dirxn b) in the dirxn parallel to vector l c) dirxn cannot be determined d) in a dirxn which dependds on the magnitude of charge density in sphere

Scorching goIITian

Joined: 26 Mar 2009
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3 Jul 2009 14:35:55 IST
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ans weeer is option D

Scorching goIITian

Joined: 26 Mar 2009
Posts: 262
3 Jul 2009 19:10:52 IST
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can any 1 ans plzzz

Cool goIITian

Joined: 24 Sep 2008
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3 Jul 2009 19:32:11 IST
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ans is b


Scorching goIITian

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3 Jul 2009 23:04:23 IST
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how can any1 explain plzz
Krishna Gopal Singh's Avatar

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Joined: 29 Dec 2006
Posts: 4965
3 Jul 2009 23:52:15 IST
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If sphere other than the cavity is uniformly charged then the field inside cavity is uniform and along l. So force on q will also be parallel to q. So (b) is right answer.



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