1.

A capacitor consists of two parallel metal plates of area A separated by a distance d. A dielectric slab of area A, thickness b and dielectric constant k is placed inside the capacitor. If C_(k) is the capacitance of capacitor with dielectric, under what limits the values of k and b are to be restricted so thatC_(k)=2C, where C is capacitance without dielectric?

Answer»

`K=(4b)/(2B-d)` & `d/3 lt b LE d`
`k=(2b)/(2b-d)` & `d/2 lt b le d`
`k=(2b)/(2b-d)` & `d/2 le b le 2d`
`k=(2b)/(2b-d)` & `d/4lebled`

Answer :B


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