Topic: Material Science
A dielectric is subjected to alternating electric field. The dielectric losses are proportional to
- A. Real part of the dielectric constant
- B. Imaginary part of the dielectric constant
- C. Both Real and Imaginary part of the dielectric constant.
- D. None of the above
Answer: B. Imaginary part of the dielectric constant
Explanation: The dielectric losses in a material subjected to an alternating electric field are governed by the relation $W(t) = \frac{1}{2} \omega \epsilon_0 \epsilon_r'' E_0^2$. Here, $\epsilon_r''$ represents the imaginary part of the complex relative permittivity (dielectric constant), meaning the loss is strictly proportional to this imaginary component.