1.

A parallel plate capacitor of area A, plate separation d and capacitance C is filled with three different dielectric materials having dielectric constants k_(1),k_(2) and k_(3) as shown. If a single dielectric naterial is to be used have the same capacitance C in this capacitor, then its dielectric constant k is given by

Answer»

`(1)/(k)=(1)/(k_(2))+(1)/(k_(2))+(1)/(2k_(3))`
`(1)/(k)=(1)/(k_(2)+k_(2))+(1)/(2k_(3))`
`k=(k_(1)k_(2))/(k_(1)+k_(2))+2k_(3)`
`k=k_(1)+k_(2)+2k_(3)`

Answer :d


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