Dielectric Breakdowns

EE 751 · Chapter 6

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6.

Dielectric Breakdowns

6.1

Electrical Breakdown in Gases: Ionization and Decay Processes, High Field Cathodic Emission, Secondary Ionization and Breakdown, Quenching, Partial Breakdown, the Corona Effect, Polarity Effects, Surge Effects

13 questions
  1. 2079 Jestha2079 Shrawan2078 Kartik2077 Chaitra2074 Bhadra2072 AshwinChapter 6: Dielectric Breakdowns6.1 Electrical Breakdown in Gases: Ionization and Decay Processes, High Field Cathodic Emission, Secondary Ionization and Breakdown, Quenching, Partial Breakdown, the Corona Effect, Polarity Effects, Surge Effects

    In an experiment in a certain gas, it was found that the steady state current is $5.5 \times 10^{-8}$ A at 8 kV at a distance of 0.4 cm between the plane electrodes. Keeping the field constant and reducing the distance to 0.1 cm results in a current of $5.5 \times 10^{-9}$ A. Calculate Townsend's primary ionization coefficient.

    ASK ON:ChatGPTClaudeAnswers · -4 / 8 marks Asked 6×
  2. 2079 Shrawan2074 Magh2070 MaghChapter 6: Dielectric Breakdowns6.1 Electrical Breakdown in Gases: Ionization and Decay Processes, High Field Cathodic Emission, Secondary Ionization and Breakdown, Quenching, Partial Breakdown, the Corona Effect, Polarity Effects, Surge Effects

    Explain Paschen's Law and with reference to this law, discuss how the breakdown strength of vacuum and high-pressure gas is higher than air at normal pressure.

    ASK ON:ChatGPTClaudeAnswers · -8 marks Asked 3×
  3. 2070 BhadraChapter 6: Dielectric Breakdowns6.1 Electrical Breakdown in Gases: Ionization and Decay Processes, High Field Cathodic Emission, Secondary Ionization and Breakdown, Quenching, Partial Breakdown, the Corona Effect, Polarity Effects, Surge Effects

    Explain Town Send's theory of breakdown in gases and derive the Town Send's current growth equation in gases including secondary ionization.

    ASK ON:ChatGPTClaudeAnswers · -8 marks Asked 1×
6.2

Electrical Breakdown in Insulating Liquids: Chemical Breakdown of Liquids, Presence of Impurities, Polar Molecules and Dielectric Heating in AC Field

4 questions
6.3

Electrical Breakdown in Solid Materials: Surface Tracking and Carbonization, Air Voids in Solid Insulating Materials, Effects of Electrical Stress Concentration, Polarization, Energy Losses and Dielectric Heating in AC Fields

14 questions
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