In the circuit shown in the figure, suppose the switch has been closed for a time interval sufficiently long for the capacitor to become fully charged.
Which one of the following is/are true?
1
The steady-state current in the resistor R2 is 517.2 μA
2
The charge Qmax on the capacitor is 50 μC
3
If the switch is opened at t = 0, the equation for the current in R2 is 277.8 × 10-6 e-5.55t
4
The time interval required for the charge on the capacitor to fall to one-fifth of its initial value is 289.7 ms