In a parallel plate capacitor with air, the distance between the plates is reduced to half and the space is filled with dielectric of constant 4. If i
In a parallel plate capacitor with air, the distance between the plates is reduced to half and the space is filled with dielectric of constant 4. If initial capacity of capacitor is `2muF`, then final value of capacity is
A. `4muF`
B. `8muF`
C. `16muF`
D. `2muF`
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Correct Answer - C
`C_(1)=2muF,C_(2)=?" ""If"" "d_(2)=d_(1)/2,k=4,C_(m)=?`
`Cprop1/d" "thereforeC_(2)=4muF`
Now`" "C_(m)=C_(2)xxk=4xx4=16muF`
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