A material is described by following electrical parameters

A material is described by following electrical parameters as a frequency of 10 GHz, σ = 10⁶ mho/m µ = µ₀ and ε/ε₀ = 10. The material at this frequencies is considered to be—
σ₀ = 1 ×10⁻⁹ F/m
36 π

1. A good conductor
2. A good dielectric
3. Neither a good conductor nor a good dielectric
4. A good magnetic material

Material may be found either conductor or insulator by the method of loss tangent

σ	=	10⁶
ωε	=	10 × 10⁹ × 10 × 8.85 × 10^-12

= 1.12 × 10⁶
so σ >> ωε

σ₀ =	1	×10⁻⁹ F/m
	36 π