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The field inside a dielectric placed in an external field is

  • A.equal to the applied field
  • B.zero
  • C.smaller than the applied field
  • D.larger than the applied field

Answer: C

The bound surface charge produces a field opposing the applied one, so the resultant within the material is reduced by the factor of the relative permittivity. This reduction is exactly what makes a dielectric increase the capacitance of an arrangement.

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