Three resistors with resistances of 2.0 2, 6.02, and 12 2 are connected across an ideal dc voltage source V as shown in the figure. If the total current through the circuit, is 1 = 4 A, what is the applied voltage V? O 2.3 V O 1.5 V O 2.7 V 5.3 V 2.00 6.0 Ω ww 1202

4

The figure shows a simple RC circuit consisting of a 100.0 V battery in series with a C = 10.0 μ F capacitor and a R = 4.3 × 105 resistor. Initially, the switch S is open and the capacitor is uncharged. 100.0 V A) 1.1 x 10-³ C B) 2.9 × 10-3 C C) 3.7 x 104 C D) 5.2 x 10-4 C E) 6.6 × 104 C I S R 10.0 µF How much charge q is on the capacitor 2.0 s after the switch is closed? (Hint: First compute the final charge on the capacitor and the RC circuit's time constant.)

In the circuit in the following figure the two capacitors are initially charged at 45.0 V. (a) How long after closing the S switch the potential through each capacitor will be reduced to 10.0 V? (b) At that time, what will be the value of the current?