A) 72 pF
B) 81 pF
C) 84 pF
D) 96 PF
Correct Answer: D
Solution :
[d] Capacity of parallel plate capacitor \[C=\frac{{{\varepsilon }_{r}}{{\varepsilon }_{0}}A}{d}\text{ }\left( \text{For air }{{\varepsilon }_{r}}=i \right)\] So, \[\frac{{{\varepsilon }_{0}}A}{d}=8\times {{10}^{-12}}\] If \[d\to \frac{d}{2}\]and \[{{\varepsilon }_{r}}\to 6\]then new capacitance \[C'=6\times \frac{{{\varepsilon }_{0}}A}{d/2}=12\frac{{{\varepsilon }_{0}}A}{d}=12\times 8pF=96pF\]You need to login to perform this action.
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