A) 2
B) 3
C) 4
D) 6
Correct Answer: D
Solution :
Capacitance with air\[C=\frac{A{{\varepsilon }_{0}}}{d}\]When interspace between the plates is filled with wax, then \[C=\frac{KA{{\varepsilon }_{0}}}{2d}\] or \[C=\left( \frac{A{{\varepsilon }_{0}}}{d} \right)\frac{K}{2}\] or \[C=C\frac{K}{2}\] \[\therefore \] \[6=2.\frac{K}{2}\Rightarrow K=6\]You need to login to perform this action.
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