At T =0s, The Current In The Circuit In The Figure Is I0. At What Time Is The Current 12i0?

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At t =0s, the current in the circuit in the figure is I0. At what time is the current 12I0?

At t =0s, the current in the circuit in

Answer

I(t) = I0 * e^(-t /T)

I(t) = I0 * e^(- t*R/L) = 0.5 * I0

e^(- t*R /L) = 0.5

t = L * ln2 /R

t = (75 * 10^-3 * ln(2)) / 300

t = 1.73 * 10^-4 sec

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