1.

In the figure shown, the capacitor is initially uncharged. Which one of the following expressions describes the current I(t) (in mA) for

A. \(I\left( t \right) = \frac{5}{3}\left( {1 - {e^{ - \frac{t}{\tau }}}} \right),\tau = \frac{2}{3}\;msec\)
B. \(I\left( t \right) = \frac{5}{2}\left( {{e^{ - \frac{t}{\tau }}}} \right),\tau = \frac{2}{3}\;msec\)
C. \(I\left( t \right) = \frac{5}{3}\left( {1 - {e^{ - \frac{t}{\tau }}}} \right),\tau = 3\;msec\)
D. \(I\left( t \right) = \frac{5}{2}\left( {1 - {e^{ - \frac{t}{\tau }}}} \right),\;\tau = 3\;msec\)
Answer» B. \(I\left( t \right) = \frac{5}{2}\left( {{e^{ - \frac{t}{\tau }}}} \right),\tau = \frac{2}{3}\;msec\)


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