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Question

If a slab of insulating material thick is introduced between the plates of a parallel plate capacitor, the distance between the plates has to be increased by to restore the capacity to original value. Then the dielectric constant of the material of slab is :

A

B

C

D

Medium

Solution

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Correct option is
A

If be the dielectric constant, the distance increased due to introduce dielectric is  
where thickness of dielectric.
According to question,






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