A) 2
B) 3
C) 6
D) 9
Correct Answer: D
Solution :
(d) 9 Capacitance of parallel plate capacitor with air \[C=\frac{{{\varepsilon }_{0}}A}{d}\] (1) Capacitance of parallel plate capacitor with dielectric \[C'=\frac{K{{\varepsilon }_{0}}A}{3d}\] (2) \[\Rightarrow \,\,\,\,\frac{C'}{C}=\frac{K{{\varepsilon }_{0}}A}{3d}\times \frac{d}{{{\varepsilon }_{0}}A}\] \[\Rightarrow \,\,\,\,\,\,\,\,\,\frac{3}{1}=\frac{K}{3}\Rightarrow K=9\]You need to login to perform this action.
You will be redirected in
3 sec