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A parallel plate capacitor with air betw...

A parallel plate capacitor with air between the plates has capacitance of `9pF`. The separation between its plates is 'd'. The space between the plates is now filled with two dielectrics. One of the dielectrics has dielectric constant `k_1=3` and thickness `d/3` while the other one has dielectric constant `k_2=6` and thickness `(2d)/(3)`. Capacitance of the capacitor is now

A

1.8 pF

B

45 pF

C

40.5 pF

D

20.25 pF

Text Solution

Verified by Experts

The correct Answer is:
C
`v=sqrt((2qV)/m)=sqrt((2qE.d)/m)`
`v=usqrt2xx10^5`
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