question_answer

A parallel plate capacitor with air between the plates has a capacitance of 9 pF. The separation between its plates is d. The space between the plates is now filled with two= dielectrics. One of the dielectrics has dielectric constant \[{{K}_{1}}=3\] and thickness d/3 while the other one has dielectric constant \[{{K}_{2}}=6\] and thickness 2d/3. What is the capacitance (in pF) of the capacitor?

Answer:

40.5