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Physics 15 Online
OpenStudy (masumanwar):

a parallel -plate capacitor has plate separation d. the space between the plates is empty. a battery supplying voltage v o is connected across the capacitor , resulting in electromagnetic energy u o stored in the capacitor . a dielectric of dielectric constant k is inserted so that it just fills the space between the plates .if the battery is still connected, what are the electric field e and the energy u stored in the dielectric in terms of vo and uo

OpenStudy (anonymous):

the capacitance increases by a factor of k but since the battery is same the potential difference is constant the charge on the capacitor will change accordingly so the final energy will be k*uo

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