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In C - R circuit, answer the following t...

In `C - R` circuit, answer the following two questions
Dielectric constant of the slab between plates of a capacitor is 18 and its resistivity is `(4 pi xx 10^(3)) Omega - m`. Then time constant of this capacitor when directly connected to a battery will be

A

`2 mu s`

B

`3 mu s`

C

`1 mu s`

D

`9 mu s`

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The correct Answer is:
A
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