IIT JEE , AIEEE Forum - Physics , Electricity

hardcore_genius

Suppose we have a non conducting sphere with a cavity having charge uniformly distributed over it.What can u say about field in the cavity???????

prateek.agarwal

arrey field will exist in da cavity...

astronautameya

no.
for whatever type of cavity, or wherever it is located, field is uniform and equal to 0

prove it using gauss law.

asmit

No austronautomeya,you are wrong in your concepts.What you said is valid for conducting sphere,not non conducting.In this case ,field will be uniform

spideyunlimited

field is always in the outward direction of +ve charge.. as theres a cavity theres no charge inside so there wont be any field inside the cavity

sivaram

as long as there is no charge inside the cavity there will not be field there

asmit

Sivaram you are wrong when you say that since the cavity conatins zero charge the field inside it is zero.This only means that the net flux is zero that is the closed integral in Gauss law is zero,not E.I think this or a similar question came in IIT JEE 2007.Check the answer in brilliant tutorial website in the soln of this years IIT paper in paper 2 PHY.The answer given there is satisfactory in my opinion to clear all doubts.

astronautameya

TO ALL CONCERNED,
spidey, sivaram and ME, are all wrong.
quite simple really, just draw the diagram, and thr u are.......
asmit is right.
sry guys, i apologise for my unthoughtful reply and this will not happen again.

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