Assertion (A): In imperfect capacitors, the current does not lead the applied ac voltage by 90°. Reason (R): When subjected to ac fields, the dielectric constant can be expressed as ∈'r - j∈"r.

Imaginary part of ∈r gives rise to absorption of energy by the material from alternating field. Hence current does not lead the voltage by 90°.

Correct Answer: Both A and R are true and R is correct explanation of A

Explanation:

Imaginary part of ∈_r gives rise to absorption of energy by the material from alternating field.

More Questions from Materials and Components