A) 8
B) 4
C) 6
D) 2
Correct Answer: C
Solution :
Capacitance,\[{{C}_{air}}=\frac{{{\varepsilon }_{0}}A}{d}\]with dielectric slab \[C'=\frac{{{\varepsilon }_{0}}A}{\left( d-t+\frac{t}{k} \right)}\] Given, \[C'=\frac{4}{3}C\] \[C'=\frac{{{\varepsilon }_{0}}A}{\left( d-t+\frac{t}{K} \right)}=\frac{4}{3}\times \frac{{{\varepsilon }_{0}}A}{d}\] \[\Rightarrow \] \[K=2\]You need to login to perform this action.
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