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Q. 26. A 3 mm gap between the square metal plates of area 0.25 mº that form a parallel-plate' capacitor is partly filled as shown by adielectric slab of the same shape and area, of thickness 2 mmand relative permittivity 2.5. Ignoring edge effects, calculatethe capacitance when the dielectric slab is partly withdrawn adistance 0.2 m in a direction parallel to an edge of the plates.3 mm0.2 m(3)2.5.2 mm |
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