The switch has been in position 1 for a long time and abruptly changes to position 2 at t = 0.

.

If time \(\rm t\) is in seconds, the capacitor voltage \(\rm V_C\) (in volts) for \(\rm t > 0\) is given by

1
\(\rm 4(1 − exp(−t/0.5))\)
2
\(\rm 10 − 6\ exp(−t/0.5)\)
3
\(\rm 4(1 − exp(−t/0.6))\)
4
\(\rm 10 − 6 exp(−t/0.6)\)

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