Published by:
CGP EDU Academic Team
Published on: September 12, 2026
An isolated parallel plate capacitor is maintained at a certain potential difference. When a 3 mm thick slab is introduced between the plates, in order to maintain the same potential difference the distance between the plates is increased by 2.4 mm. Find the dielectric constant of slab.
Text Solution
Verified by ExpertsThe correct answer is:
5
(5)
Sol. q = q', C 0 V 0 = CV, C 0 = C
as V = V 0 given
C 0 = 
, C 1 = 
But by increasing d to d + 0.24 cm then
C 1 becomes C = 
d = d + 0.24 – t + 
, K = 
= 5
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