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mba444
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Homework Statement
When a certain air-filled parallel-plate ca-
pacitor is connected across a battery, it ac-
quires a charge (on each plate) of magnitude
214 μC. While the battery connection is
maintained, a dielectric slab is inserted into
the space between the capacitor plates and
completely fills this region. This results in
the accumulation of an additional charge of
272 μC on each plate.
http://images.upload2world.com/get-6-2009-upload2world_com_ohteyhd.jpg
What is the dielectric constant of the slab?
Homework Equations
i used
k= Uf/Ui
where
Uf=Q2^2/2C
Ui=Q1^2/2C
The Attempt at a Solution
what i did is that i k=[Q2^2/2C]/[Q1^2/2C] .. in this case the 2C will cancel each other .. we will be left out with k=[Q2^2/Q1^2] .. which as a result gave me 1.61551
i really don't know were I am going wroing .. so please help mee !
thanx in advance
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