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AP EAMCET2004PhysicsCapacitance

The plates of a parallel plate capacitor are charged upto 200 volts. A dielectirc slab of thickness 4 ~mm is inserted between its plates. Then, to maintain the same potential difference between the plates of the capacitor, the distance between the plates is increased by 3.2 ~mm . The dielectric constant of the dielectric slab is

Options

  1. A1
  2. B4
  3. C5
  4. D6

Correct answer

C. 5

Step-by-step solution

aligned & ₀ A d = ₀ A d^ -t+ t K & d=d^ -t+ t K d^ -d=t (1- 1 K ) aligned Here, d^ -d=3.2 ~mm , t=4 ~mm aligned & 3.2=4 (1- 1 K ) 1- 1 K & 3.2 4 =1- 1 K 1- 1 K = 4 5 & K=5 & aligned

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