A parallel - plate capacitor of area 
, plate separation 
and capacitance 
is filled with four dielectric materials having dielectric constants 
and 
as shown in the figure below. If a single dielectric material is to be used to have the same capacitance C in the capacitor, then its dielectric constant 
is given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Here the capacitance, 
The above three capacitors 
are in parallel and then it is in series with 
Here, 
Now the equivalent capacitance for the combination of four capacitors is
or, 
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