NCERT Class XII Chapter
Electrostatic Potential and Capacitance
Questions With Solutions

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Question : 5
Total: 37
A parallel plate capacitor with air between the plates has a capacitance of 8 pF. What will be the capacitance if the distance between the plates is reduced by half, and the space between them is filled with a substance of dielectric constant 6?
Solution:  
C0 =
ε0A
d
= 8 pF
C =
Kε0A
d2
=
2Kε0A
d
= 2KC0 = 2 × 6 × 8 pF or C = 96 pF
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