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