Value of εr for air is:
Correct answer: D. 1.0006
- A. 1.6
- B. 1.96
- C. 1.986
- D. 1.0006
Explanation
The relative permittivity, or dielectric constant, is a measure of a material's ability to permit electric field lines. For air, this value is very close to that of a vacuum, which is 1. Therefore, the relative permittivity of air is approximately 1.0006, making Option D the correct choice. The other options represent values that are too high and are more typical of other materials such as liquids or solids with higher dielectric constants.
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