A) 1
B) 2
C) 3
D) 4
Correct Answer: D
Solution :
The capacitance of parallel plate air capacitor \[C=\frac{{{\varepsilon }_{0}}A}{d}\] ?. (i) where A is the area of each plate and d is the distance between the plates. In a medium of dielectric constant K and with given condition \[C=\frac{K{{\varepsilon }_{0}}A}{d}\] Given, \[A=A,\,d=2\,d,\,C=2C\] \[\therefore \] \[2C=\frac{K{{\varepsilon }_{0}}A}{2\,d}\] ... (ii) Equating Eqs. (i) and (ii), we get \[K=4\]You need to login to perform this action.
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