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A parallel plate capacitor is of area 6 cm 2 and a separation 3 mm. The gap is filled with three dielectric materials of equal thickness (see figure) with dielectric constants K 1 = 10, K 2 = 12 and K 3 = 14. The dielectric constant of a material which when fully inserted in above capacitor, gives same capacitance would be - 3 mm K 1 K 2 K 3

  1. 12
  2. 36
  3. 14
  4. 4

Correct answer: 12

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