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Q.

A parallel plate capacitor of capacitance C0  is charged to a voltage V and then the  battery  is disconnected. A dielectric covering one-third area of each plate is now inserted as  shown in the figure. If charges on the capacitor plates get redistributed such  that the  portions covered with dielectric and not covered with the dielectric share equal  amounts of charge, which of the following statements is/are true?

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a

Dielectric constant of the dielectric is 2.0.

b

Charge appearing due to polarization on the surface of the dielectric is  0.25C0V.

c

Force of electrostatic interaction between portions of the plates covered with  dielectric is equal to that between uncovered portions.

d

Force of electrostatic interaction between the plates after insertion of the dielectric  becomes 9/8 times of its value before insertion of the dielectric.

answer is A, B, D.

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A parallel plate capacitor of capacitance C0  is charged to a voltage V and then the  battery  is disconnected. A dielectric covering one-third area of each plate is now inserted as  shown in the figure. If charges on the capacitor plates get redistributed such  that the  portions covered with dielectric and not covered with the dielectric share equal  amounts of charge, which of the following statements is/are true?