APFIVE Estimating Initial Current in an RC Circuit
A capacitor discharges through a resistor, transferring $$3.6 \times 10^{-3}\ \mathrm{C}$$ of charge in the first $$0.12\ \mathrm{s}$$. The current at time $$t$$ is given by $$I(t) = I_0 e^{-t/RC}$$, where the time constant $$RC$$ is unknown. Which of the following is the best estimate for the initial current, $$I_0$$?
A
4.3 × 10^-3 A
B
4.3 × 10^-4 A
C
3.0 × 10^-1 A
D
3.0 × 10^-2 A
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