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1. 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.
(A): Both A and R are true and R is correct explanation of A
(B): Both A and R are true but R is not correct explanation of A
(C): A is true but R is false
(D): A is false but R is true
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