In the circuit shown below, the switch \( S \) is connected to position \( P \) for a long time so that the charge on the capacitor becomes \( q_1 \, \mu\text{C} \). Then \( S \) is switched to position \( Q \). After a long time, the charge on the capacitor is \( q_2 \, \mu\text{C} \).
The magnitude of \( q_1 \) is _____.
