A) BpF
B) 10pF
C) 80 pF
D) 100 pF
Correct Answer: C
Solution :
(c) 80pF Capacitance of the capacitor with air between plates \[C'=\frac{{{\varepsilon }_{0}}A}{d}=8pF\] With the capacitor is filled with dielectric (k = 5) between its plates and the distance between the plates is reduced by half, capacitance become \[C=\frac{{{\varepsilon }_{0}}kA}{d/2}=\frac{{{\varepsilon }_{0}}\times 5\times A}{d/2}=10C'=10\times 8=80pF\]You need to login to perform this action.
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