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![[Post New]](/templates/default/images/icon_minipost_new.gif) 23 Jun 2008 21:29:29 IST
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why does electric field intensity between the plates of capacitor descreases on introducing insulating plate b/w
the plates of capacitor???
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Becoz permittivity of a medium is less than that of vacuum/air.
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25 Jun 2008 23:06:57 IST
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this is because opposite charge is induced at the surface of of insulating plate ..and it has electric field in direction opposite to the original one..hence the final electric field indie the plates decreases..
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B.Tech CSE, ISMU |
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25 Jun 2008 23:26:36 IST
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@ tarin
i think permittivity of a medium >of vacuum/air.
absolute permittivity of medium = k* permittivity of vaccum .......right ??
k >1
so permittivity of a medium >of vacuum/air.
m i right ??
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26 Jun 2008 00:39:12 IST
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n also electric field intensity between plates
= charge density (sigma) /permittivity
n permittivity of a medium > of vacuum/air.
therefore
electric field intensity between the plates of capacitor descreases on introducing insulating plate b/w the plates of capacitor
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27 Jun 2008 20:45:24 IST
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when we insert the insulating plate the electrons inside the insulating plate arrange themselves in such a fashion that they create a field
in the direction opposite to the filed that was in capacitor before inserting the plate
hence the resultant field decreases coz of generation of field in
opposite direction...
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27 Jun 2008 21:50:51 IST
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see here
http://www.goiit.com/chapters/tutorial/physics/electric-capacitance-5.htm
Capacity is er times more.
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it is not important where u stand, but in which direction u are moving |
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27 Jun 2008 22:12:32 IST
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du to the induced charges in the insulator, the net force per charge (electric field) decreases..
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Agar aap 90 baar paap karoge to keval 45 baar hi pakde jaoge......batao
kyu????* *
b'cos.... sin90=cot 45 |
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