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Q1- What are the various factors which affect Dielectric Strength?

Q1- What are the various factors which affect Dielectric Strength?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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HOME WORK Q1- What are the various factors which affect Dielectric Strength? Q2- What are the limitations of Townsend's theory? Q3- In an experiment in a certain gas it was found that the steady state current is 6 x 108 A at 10 kV at a distance of 0.3 cm between the plane electrodes. Keeping the field constant and reducing the distance to 0.15 cm results in a current of 6 x 10°A. Calculate Townsend's primary ionization coefficient a Q4-In an experiment for determining the breakdown voltage of transformer oil, the following observations were made. Determine the power law between the gap spacing and the applied voltage of the oil. Gap spacing (mm) Bd. voltage (kV) 6. 9. 10 86 148 169 219 Q5- Select the correct answer for the alternatives given 1-1-The liquid dielectrics contain voids or cavities within the medium or at the boundaries between the dielectric and the electrodes. The electric field strength in the voids is a. Lower than that across the dielectric b. Higher than that across the dielectric c. Equal to that across the dielectric d. None of these 2- Field in case of rod gaps and sphere gaps are a. Uniform, uniform b. Uniform, non-uniform c. Non-uniform, uniform d. Non-uniform, non-uniform 3- The statistical time lag depends upon the a. Size of gap b. Quantity of radiation that produces the primary electrons c. Amount of pre-ionization preset gap d. All of these 4- Liquids dielectrics are mainly used as a. Impregnants in high voltage cables b. In capacitors c. For filling up transformers d. All of these
Transcribed Image Text:HOME WORK Q1- What are the various factors which affect Dielectric Strength? Q2- What are the limitations of Townsend's theory? Q3- In an experiment in a certain gas it was found that the steady state current is 6 x 108 A at 10 kV at a distance of 0.3 cm between the plane electrodes. Keeping the field constant and reducing the distance to 0.15 cm results in a current of 6 x 10°A. Calculate Townsend's primary ionization coefficient a Q4-In an experiment for determining the breakdown voltage of transformer oil, the following observations were made. Determine the power law between the gap spacing and the applied voltage of the oil. Gap spacing (mm) Bd. voltage (kV) 6. 9. 10 86 148 169 219 Q5- Select the correct answer for the alternatives given 1-1-The liquid dielectrics contain voids or cavities within the medium or at the boundaries between the dielectric and the electrodes. The electric field strength in the voids is a. Lower than that across the dielectric b. Higher than that across the dielectric c. Equal to that across the dielectric d. None of these 2- Field in case of rod gaps and sphere gaps are a. Uniform, uniform b. Uniform, non-uniform c. Non-uniform, uniform d. Non-uniform, non-uniform 3- The statistical time lag depends upon the a. Size of gap b. Quantity of radiation that produces the primary electrons c. Amount of pre-ionization preset gap d. All of these 4- Liquids dielectrics are mainly used as a. Impregnants in high voltage cables b. In capacitors c. For filling up transformers d. All of these
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