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JEE Main202127 Jul 2021Morning ShiftPhysicsCapacitanceActual

In the reported figure, a capacitor is formed by placing a compound dielectric between the plates of parallel plate capacitor. The expression for the capacity of the said capacitor will be: (Given the area of the plate = A )

Options

  1. A15 34 K ε 0   A   d
  2. B15 6 K ε 0   A   d
  3. C25 6 K ε 0   A   d
  4. D9 6 K ε 0   A   d

Correct answer

A. 15 34 K ε 0   A   d

Step-by-step solution

1 C eff = d K ∈ 0 A + 2 d 3 K ∈ 0 A + 3 d 5 ∈ 0 A C eff = 15 K ∈ 0 A 34 d

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