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GATE ECE 1993 | Question-65

A material is described by the following electrical parameters as a frequency of $10 \mathrm{GHz}, \sigma=10^{6} \mathrm{mho} / \mathrm{m}, \mu=\mu^{0}$ and $\sigma / \sigma^{0}=10$. The material at this frequency is considered to be
\[
\left(\sigma_{0}=\frac{1}{36 \pi} \times 10^{-9} \mathrm{~F} / \mathrm{m}\right)
\]

  1. a good conductor
  2. a good dielectric
  3. neither a good conductor, nor a good dielectric
  4. a good magnetic material

     

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