in the circuit shown, all meters are idealized and the batteries have no appreciable internal resistance. 100.0 Ω + 25.0 V S A a 15.0 + V 75.0 Ω V b a. What is the reading of the voltmeter when the switch S is open? Which point is at a higher potential: a or b? b. With S closed, what are the reading of the voltmeter and ammeter? Which way (up or down) does the current flow through the switch?

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Initially, for the circuit shown, the switch S is open and the capacitor is uncharged. The switch S is closed at time t = 0. In the figure shown, when the time t is equal to 8.0 s, the charge on the capacitor (in mC), is closest to: a. 4.06 b. 13.2 c. 0.23 d. 2.26 e. 1.33 70 V L www 0.20 ΜΩ 90 μF

15V a. + AM 10.2. 4 t=0 um 45² 652 im + V 1 ic (t) b. Assume switch has been closed for Find a mathematical expression for Vc it capacitor is initially uncharged and the switch is closed at t = 0. Sketch Vc lt). 20m F a long time. opening Fird an expression for ic immediately after the switch and sketch it.