Question: The excess charge in a certain medium decreases to one-third of its initial value in 20s. (a) If the conductivity of the medium is 10

The excess charge in a certain medium decreases to one-third of its initial value in 20μs.
(a) If the conductivity of the medium is 10 4 S/m, what is the dielectric constant of the medium?
(b) What is the relaxation time?
(c) After 30μs, what fraction of the charge will remain?

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