Question

The capacitance of a parallel plate capacitor with air as medium is . With the introduction of a dielectric medium, the capacitance becomes . The permittivity of the medium is :
 

A

B

C

D

Medium
Solution
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Correct option is B)

Capacitance of air capacitor 
          ......... (i)
When a dielectric of permittivity and dielectric constant K is introduced between the plates, then
Capacitance,       ..... (ii)
Dividing eq. (ii) by (i), we get


permittivity of the medium

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