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GATE 2014 EE (EE1) – Question 24

Power Systems · Series and shunt compensation, Electric field distribution and insulators, Distribution systems · 1 mark · Multiple choice

Which property is undesirable in an electrical insulating material?

  1. High dielectric strength
  2. High relative permittivity
  3. High thermal conductivity
  4. High insulation resistivity

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Show answer and explanation

Correct answer: (B) High relative permittivity

Explanation

High dielectric strength and high resistivity resist breakdown and leakage; high thermal conductivity helps remove heat. High relative permittivity increases capacitance and stored electric-field energy and is the undesirable choice in this insulation context. Therefore **B**. Material preferences depend on application, but this is the intended power-insulation comparison.