A parallel plate capacitor with air between the plates has a capacitor of 8pF `("1pF="10^(-12)F)`. What will be the capacitance if the distance if the distance between the plates is reduced by, half and the space between them is filled with a substance of dielectric constant 5?

Explanation

`C=8pF, C=(epsi_(0)A)/(d)`
`C.=(epsi_(0) epsi_(0)A)/(d/2)=2epsi_(r) C therefore C.=2 xx 6 xx 8 xx 10^(-12)F=96pF`