Question #a71ed

1 Answer
A08
May 30, 2016

2.598" uf", rounded to three decimal places

Explanation:

We know that capacitance of a parallel plate capacitor is given by the expression
C=epsilon A/d
Where epsilon is absolute permittivity of the dielectric, A is area of plate overlap and d is the distance between the plates.
Absolute permittivity of air=1.0006
Absolute permittivity of polystyrene=2.6
Therefore,
C_"polystyrene"=C_"air"xx"Absolute permittivity of polystyrene"/"Absolute permittivity of air"
Inserting various values
C_"polystyrene"=1 xx2.6/1.0006=2.598" uf", rounded to three decimal places

Average dielectric constant of polystyrene as 2.6, Ref

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