Find the new capacitance if two dielectr...

Find the new capacitance if two dielectric of dielectric constant 4 and 6 are filled in a capacitor of capacitance `1muF`

`4muF`

`10 muF`

`5 muF`

`7 muF`

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A parallel plate capacitor 'A' of capacitance 1 muF is charged to a potential drop 100 volt and then disconnected form the battery. Now the capacitor 'A' is completely filled with a dielectric slap of dielectric constant k = 4 . Another parallel plate capacitor 'B' of capacitance 2 muF is charged to a potential drop 20 volt and then disconnected from the battery. Now the two capacitors 'A' and 'B' are connected with each other with opposite polarities. Then the heat dissipated after connecting the capacitors is

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