1.

The charge on a capacitor decreases η times in time t, when it discharges through a circuit with a time constant τ.(a) t = ητ(b) t = τ ln η(c) t = τ(ln η - 1)(d) t = τ ln (1 - 1/η)

Answer»

Correct Answer is: (b) t = τ ln η

Q = Q0 e -t/τ = Q0

or e -t/τ 1/η

or et/τ = η

or t/τ = ln η. 



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