Question

# A parallel plate capacitor with air between the plates has capacitance of . The separation between its plates is ''. The space between the plates is now filled with two dielectrics. One of the dielectrics has dielectric constant and thickness while the other one has dielectric constant and thickness . Capacitance of the capacitor is now :

A
B
C
D
Hard
Solution
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Correct option is C)

## The air filled capacitance , According to question there are two capacitor with capacitances and . and they are in series .Here,    as and    as The equivalent capacitance,

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