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April 20, 2014

Homework Help: physics

Posted by Mike on Friday, February 18, 2011 at 5:08am.

A slab of copper of thickness b = 1.566 mm is thrust into a parallel-plate capacitor of C = 4.0010-11 F of gap d = 10.0 mm, as shown in the figure; it is centered exactly halfway between the plates.

If a charge q = 3.0010-6 C is maintained on the plates, what is the ratio of the stored energy before to that after the slab is inserted?

How much work is done on the slab as it is inserted?

Is the slab pulled in or must it be pushed in?

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