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A paper-filled capacitor is charged to a potential difference of

`V_(0)=2.4V`

. The dielectric constant of paper is

`\kappa =3.7`

. The capacitor is then disconnected from the charging circuit and the paper filling is withdrawn, allowing air to fill the gap terween the plates. Find the new potential difference

`V_(1)`

of the capacitor. While the capacitor is disconnected from the charging circuit, an unknown substance is inserted between the plates. The plates then attain a potential difference that is 0.67 times the original potential difference

`V_(0)`

(when paper filled the capacitor). What is this unknown substance's dielectric constant

`\kappa _(u)`

?

`K_(u)=`

IncorrectWhile the capacitor is disconnected from the charging circuit, an unknown substance is inserted between the plates. The plates then attain a potential difference that is 0.67 times the original potential difference

`V_(0)`

(when paper filled the capacitor). What is this unknown substance's dielectric constant

`\kappa _(u)`

? Incorrect