C0 is the capacitance of a parallel plate capacitor with air as dielectric (as in figure (a)). If, half of the entire gap as shown in figure (b) is filled with a dielectric of permittivity 系r , the expression for the modified capacitance is聽
1
\(\frac{{{C_0}}}{2}\left( {1 + {\epsilon_r}} \right)\)
2
\(\left( {{C_0} + {\text{ }}{\epsilon_r}} \right)\)
3
\(\frac{{{C_0}}}{2}{\epsilon_r}\)
4
C0 (1 + 系r)