Separation between the plates of a parallel plate capacitor is \( 5 \mathrm{~mm} \). This capaci...

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Separation between the plates of a parallel plate capacitor is \( 5 \mathrm{~mm} \). This capacitor, having air as the dielectric medium between the plates, is charged to a potential difference \( 25 \mathrm{~V} \) using a battery. The battery is then disconnected and a dielectric slab of thickness \( 3 \mathrm{~mm} \) and dielectric
constant \( \mathrm{K}=10 \) is placed between the plates, as shown.
img src=https://penpencil-static-content.s3.ap-south-1.amazonaws.com/5eb393ee95fab7468a79d189/hd3g5uhbk09k0k1tow64npl7t.png width=104 height=142 /
Potential difference between the plates after the dielectric slab has been introduced is:
a. \( 18.5 \mathrm{~V} \)
b. \( 13.5 \mathrm{~V} \)
c. \( 11.5 \mathrm{~V} \)
d. \( 6.5 \mathrm{~V} \)
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