Question

If the loss tangent is very less, then the material will be a

(a) Conductor

(b) Lossless dielectric

(c) Lossy dielectric

(d) Insulator

This question was addressed to me in a national level competition.

Origin of the question is Displacement and Conduction Current topic in division Electric Fields in Material Space of Electromagnetic Theory

Answer 1

Correct option is (b) Lossless dielectric

Best explanation: If loss tangent is less, then σ /ε ω <<1. This implies the conductivity is very poor and the material should be a dielectric. Since it is specifically mentioned very less, assuming the conductivity to be zero, the dielectric will be lossless (ideal).