In the circuit shown in the figure, if \( \varepsilon = 24 \text{ V} \), \( R = 40 \text{ k}\Omega \), and \( C = 50 \text{ \mu F} \). The capacitor is initially uncharged when the switch, S, is closed. Answer Q20 & Q21
Q20: The charge (in \( \mu \text{C} \)) on the capacitor at \( t = 1 \text{ s} \) is:
A) 472
B) 225
C) 777
D) 632
E) 393
Q21: The time (in second) required for the current to get 0.3 of its initial value \( (0.3 I_0) \) is:
A) 1.39
B) 3.25
C) 4.6
D) 0.71
E) 2.41
