Multiple choice

In the circuit shown below, the initial charge on the capacitor is 2.5 mC, with the voltage polarity as indicated. The switch is closed at time t = 0. The current i(t) at a time t after the switch is closed is

  1. i(t) = 15exp (- 2 x 103 t) A

  2. i(t) = 5exp (- 2 x 103 t) A

  3. i(t) = 10exp (- 2 x 103 t) A

  4. i(t) = 20exp (- 2 x 103 t) A

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Explanation