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princessmaddiegigi
26.12.2019 •
Physics
A25 {\rm pf} parallel-plate capacitor with an air gap between the plates is connected to a 100 {\rm v} battery. a teflon slab is then inserted between the plates, and completely fills the gap.what is the change in the charge on the positive plate when the teflon is inserted? (change in q=? nc)
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Ответ:
0.275 nF
Explanation:
First of all, let's calculate the initial charge stored by the capactiro when it is in air. This is given by:
where
Substituting, we find
When the Teflon slab is inserted between the plates, the capacitance changes according to:
where
And so, the change in the charge on the capacitor is:
Ответ:
me too
Explanation: