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A parallel plate capacitor with air as dielectric is charged to a potential V. It is then connected to an uncharged parallel plate capacitor filled with wax of dielectric constant K. The common potential of both capacitor is
detailed solution
Correct option is D
Before connection, the charge Q on the plates of air filled capacitor is C V. After it is connected with an uncharged capacitor, let y' be the common potential. Let Q1 and Q2 be the charges on charged and uncharged capacitor respectively. ThenQ1=V′C and Q2=V′(KC)∴ CV=V′C+V′(KC)=(1+K)V′C or V′=V1+KTalk to our academic expert!
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A parallel plate, air filled capacitor has capacitance C. When a dielectric material of dielectric constant 4 is filled so that half of the space between plates is occupied by it, then percentage increase in the capacitance is equal to
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