In the circuit shown in the following figure(Figure 1) the capacitor has capacitance 21 uF and is initially uncharged. The resistor Ro has resistance 120. An emf of 86.0 V is added in series wilh the capacitor and the resistor. The emf is placed between the capacitor and the switch, with the positive terminal of the emf adjacent to the capacitor. The small circuit is not connected in any way to the large one. The wire of the small circuit has a resistance of 1.10/m and contains 29 loops. The large circuit is a rectangle 2.0 m by 4.0 m, while the small one 13.0 cm and b has dimensions a = 18.0 cm The

The capacitor, C1 = 1.2 pF, in the circuit below begins with no stored charge. At t = 0 seconds, the switch is closed. What is the current (in mA) through the resistor, R1 = 9.1 MQ, at t = 4.2 usec? R1 +12V ww

A capacitor of capacitance C and resistors of resistance R are connected in series as shown in the picture below. The switch is initially open. Which of the following statements is true after the switch has been closed for a very long time? C R AVR = 0 AVc = 0

Three 100 Ohm resistors are connected as shown in the figure. The maximum power that can safely be delivered to any one resistor is 25.5 W. (a) what is the maximum potential difference that can be applied to the terminals a and b? (b) For the voltage determined in part (a), what is the power delivered to each resistor? resistor on the left resistor at the top of the loop resistor at the bottom of the loop (c) What is the total power delivered to the combination of resistors?

For the circuit shown in the figure, V = 20 V, C = 10 μF, R = 0.80 MQ, and the battery is ideal. Initially the switch S is open and the capacitor is uncharged. The switch is then closed at time t = 0.00 s. What is the charge across the capacitor 20 s after closing the switch? { www R O 0.18 mC O 1.5 mC O 0.48 mC O 3.0 MC O 2.3 MC

5.0 k2 and R2 =10.0 k2, along 4. In the circuit shown, there are two resistors, with R1 with a capacitor, with C=15.0 µF, initially uncharged, parallel to the second resistor. The battery supplies a voltage of &=30.0 V. The switch is closed at t= 0. (a) At that instant, what is the current in each resistor? What are the final (b) currents and (c) charge on the capcitor when the switch has been closed for a long time? (d) When the switch is re-opened, what is the time-constant for the discharging capacitor? R C

RC Circuits: For the circuit shown in the figure, V = 60 V, C = 40 µF, R = 0.90 MQ, and the battery is ideal. Initially the switch S is open and the capacitor is uncharged. The switch is then closed at time t = 0.00 s. At a given instant after closing the switch, the potential difference across the capacitor is twice the potential difference across the resistor. At that instant, what is the charge on the capacitor? 03 R C

. An RC circuit with a 54.0 V power source is connected to a fluorescent lamp as shown in the ngure. The lamp L turns on when the voltage across the capacitor reaches 45.0V, which happens after 0.65 seconds after the switch is closed. If R = the capacitance C? (b) If we must switch the lamps 3 times in a second, what should be the value of capacitance? (c) What is the charge on the capacitor when the lamp just flashes in 3MQ, (a) what is the value of both the cases? ww R 54.0V

The circuit in the figure below contains two resistors, R, 2.20 kN and R, = 3.10 kN, and two capacitors, C, = 2.10 µF and C, = 3.10 µF, connected to a %D battery with emf & = 115 V. There are no charges on the capacitors before switch S is closed. R1 C1 7. R2 C2 3. (i (a) Determine the charge on capacitor C, as a function of time (in ms), after the switch is closed. (Use the following as necessary: t.) -t 5.15 HC 9, = %3D 598 1–e (b) Determine the charge on capacitor C, as a function of time (in ms), after the switch is closed. (Use the following as necessary: t.) HC 92 %3D

Which graph best represents the the magnitude of the voltage measured across the resistor by the voltmeter labeled VR?