The capacitance of a parallel plate capacitor is $5\, \mu F$ . When a glass slab of thickness equal to the separation between the plates is introduced between the plates, the potential difference reduces to $1/8$ of the original value. The dielectric constant of glass is

  • A

    $1.6$

  • B

    $40$

  • C

    $5$

  • D

    $8$

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