A capacitor is composed of three parallel conducting plates. All three plates are of the same area A. The first pair of plates are kept a distance d 1 apart, and the space between them is filled with a medium of a dielectric K 1 . The corresponding data for the second pair are d 2 and K 2 , respectively.
The middle plate is connected to the positive terminal of a constant voltage source V and the external plates are connected the other terminal of V.
Text Solution
Verified by ExpertsCHECK THE SOLUTION.
ε 0 A 
= 
and 
= 
Sol.
C eq = C 1 + C 2 = 
+ 
= 
Surface charge denisity = 
= 
and 
= 
Energy density in medium K 1 = 
= 
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