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1. ∈r is determined by the atomic structure of the dielectric.



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MCQ->Assertion (A): In a parallel plate capacitor having area of plate 1 m2 and plate separation 1 m, the capacitance C and resistance R are given by C = ∈0∈'r and R = where ω is frequency, ∈r' and ∈r" are real and imaginary parts of dielectric constant.Reason (R): The imaginary part of electric constant is responsible for dielectric losses.

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MCQ->A leaky dielectric has ∈r = ∈r' - j∈r". If a field E is applied, the current component in phase with E is proportional to ∈r".....
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MCQ->Assertion (A): Dielectric losses are proportional to tan δ.Reason (R): tan δ = where ∈r' and ∈r" denote the real and imaginary parts of ∈r.

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MCQ->Assertion (A): Relative permittivity is determined by the atomic structure of the material.Reason (R): Absolute permittivity is determined by the atomic structure of the material.

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