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Explain what would happen if in the capa...

Explain what would happen if in the capacitor in `Q. 8, a3` mm thick mica sheet of (dielectric constant = 6) were inserted between the plates (a) while the voltage supply remained connected (b) after the supply was disconnected.

Text Solution

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(a) While the voltage supply remained connected, voltage remains constant.
Capacity increases to `C' = KC_(0) = 6xx1.77xx10^(-11) F`
charge increases to `q' = C' V = 6xx1.77xx10^(-11)xx10^(2) C`.
(b) After the supply was disconnected, charge remains constant. New capacity,
`C' = KC_(0) = 6xx1.77xx10^(-11) F`
new voltage `V' = (q)/(C') = (1.77xx10^(-9))/(6xx1.77xx10^(-11)) = 16.67 V`
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