Conductor in capacitor

What exactly happens when we insert a conductor in a capacitor(i) completely (ii) In middle so that there is some air in the region left.

A conductor placed inside the capacitor plates will result in charge induction on the surface such that opposite charges appear on the plates facing the capacitor.

If conductor is insertd completely, the charges across teh paltes of capacitor will get exchanged and hence get short. on the other hand, if teh condutor is kept midway not touching either of teh plates ,the arrangement will behave as if the capacitor is set of two capacitors in series.

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