Which of the following materials behaves as a dielectric?

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AAI ATC Junior Executive 2018 Official Paper (Shift 1)
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  1. Tungsten
  2. Copper
  3. Germanium
  4. Mica

Answer (Detailed Solution Below)

Option 4 : Mica
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Detailed Solution

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Dielectric:

  • A dielectric is a substance that does not allow the flow of charges through it but permits them to exert electrostatic forces on one another through it.
  • A dielectric is essentially an insulator that can be polarised through the small localized displacement of charges.
  • Dielectrics are non-conducting substances. In contrast to conductors, they have no (or negligible number of) charge carriers.
  • They can be used to store charge even though they cannot conduct it very well.
  • Examples: Air, Water, Diamond, Ceramic, Plastic, Mica, Glass etc.
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