JEE Main & Advanced
Sample Paper
JEE Main - Mock Test - 8
question_answer
A parallel plate air capacitor has a capacitance C (Fig. 1). When it is half filled with a dielectric of dielectric constant 5 (Fig. 2), the percentage increase in the capacitance will be
A)400%
B)33.3%
C)66.6%
D)200%
Correct Answer:
D
Solution :
[d] Now If \[C=\frac{A{{\varepsilon }_{0}}}{d}\] \[Ceq=3C\] \[\Delta C=3C-C\] % \[\Delta C\]= 200%