STANDARDPhysics-Electrostatics
STANDARD Physics Capacitance MCQ Question
Type: MCQ-numerical-Medium
A parallel plate capacitor with air between the plates has a capacitance of 10 pF. 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 4 is
A
80 pF
B
96 pF
C
100 pF
D
120 pF
Correct Answer
Option A
Detailed Explanation
Here, C₁ = ε₀A/d = 10 pF. When the distance is halved and dielectric is introduced, C₂ = Kε₀A/(d/2) = 4 × 2ε₀A/d = 80 pF.
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