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If a dielectric slab of thickness 5 mm a...

If a dielectric slab of thickness 5 mm and dielectric constant K=6 is introduced between the plates of a parallel plate air capacitor, with plate separation of 8 mm, then its capacitance is

A

1. decreased

B

2. unaffected

C

3. almost halved

D

4. almost doubled

Text Solution

Verified by Experts

The correct Answer is:
D
`C_(1)=(epsi_(0)A)/(8xx10^(-3))`
`C_(2)=(epsi_(0)A)/((d-t)+(1)/(K))=(epsi_(0)A)/((8-5)xx10^(-3)+(5xx10^(-3))/(6))`
`therefore C_(2) underset(.)overset(.)(=)2C_(1)`
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