Problem: An unchanged 8.80- µF capacitor is in series, through a switch, with a 4.90-Mohm resistor and a 16.0- V battery (with negligible internal resistance.) The switch is closed at t = 0 and a current of Ii immediately appears.
Part A: How long will it take for the current in the circuit to drop to 0.37Ii?
I need help to determine how long will it take for the current.