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A dielectric material has a relative permittivity 15 and loss tangent 3.33 × 10-4 at 100 MHz. Find the conductivity of the material (in Ξ©-1m-1)?


33. A dielectric material has a relative permittivity 15 and loss tangent 3.33 × 10-4 at 100 MHz. Find the conductivity of the material (in Ξ©-1m-1)?

  1. 2.77 × 10-4
  2. 104
  3. 0.27 × 10-4
  4. 2.25 × 10-4
Answer: 3

Solution: 
conductivity, Οƒ=tanΞ΄⋅ωϡ
Ο‰ = 2*pi*100*10^6
Ο΅ = 15 * 8.854* 10^(-12)

or, conductivity = 3.33*10^(-4)*2*pi*100*10^6*15 * 8.854* 10^(-12) = 2.78 * 10^(-5)
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