Exam 23: Circuits

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As more resistors are added in series to a constant voltage source, the power supplied by the source

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Three identical capacitors are connected in series across a potential source (battery). If a charge of Q flows into this combination of capacitors, how much charge does each capacitor carry?

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The network shown is assembled with uncharged capacitors X , Y, and Z, with CX = 4.0 μF, CY = 6.0 μF, and CZ = 5.0 μF. The switches S1 and S2 are initially open, and a potential difference Vab = 120 V is applied between points a and b. After the network is assembled, switch S1 is then closed, but switch S2 is kept open. What is the final potential difference across capacitor X? The network shown is assembled with uncharged capacitors X , Y, and Z, with C<sub>X</sub> = 4.0 μF, C<sub>Y</sub> = 6.0 μF, and C<sub>Z</sub> = 5.0 μF. The switches S<sub>1</sub> and S<sub>2</sub> are initially open, and a potential difference V<sub>ab</sub> = 120 V is applied between points a and b. After the network is assembled, switch S<sub>1</sub> is then closed, but switch S<sub>2</sub> is kept open. What is the final potential difference across capacitor X?

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What is the potential drop from point A to point B for the circuit shown in the figure? The battery is ideal, and all the numbers are accurate to two significant figures. What is the potential drop from point A to point B for the circuit shown in the figure? The battery is ideal, and all the numbers are accurate to two significant figures.

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For the circuit shown in the figure, C = 13 µF and R = 7.6 MΩ. Initially the switch S is open with the capacitor charged to a voltage of 80 V. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor 40 s after closing the switch? For the circuit shown in the figure, C = 13 µF and R = 7.6 MΩ. Initially the switch S is open with the capacitor charged to a voltage of 80 V. The switch is then closed at time t = 0.00 s. What is the charge on the capacitor 40 s after closing the switch?

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Each of the resistors shown in the figure has a resistance of 180.0Ω180.0 \Omega What is the equivalent resistance between points a and b of this combination?  Each of the resistors shown in the figure has a resistance of  180.0 \Omega  What is the equivalent resistance between points a and b of this combination?

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A15-Ω resistor is connected in parallel with a 30-Ω resistor. If this combination is now connected in series with an ideal 9.0-V battery and a 20-Ω resistor, what is the current through the 15-Ω resistor?

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A 9-V battery is hooked up to two resistors in series using wires of negligible resistance. One has a resistance of 5 Ω, and the other has a resistance of 10 Ω. Several locations along the circuit are marked with letters, as shown in the figure. Which statements about this circuit are true? (There could be more than one correct choice.) A 9-V battery is hooked up to two resistors in series using wires of negligible resistance. One has a resistance of 5 Ω, and the other has a resistance of 10 Ω. Several locations along the circuit are marked with letters, as shown in the figure. Which statements about this circuit are true? (There could be more than one correct choice.)

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Four unequal resistors are connected in a parallel with each other. Which one of the following statements is correct about this combination?

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A 5-µF, a 7-µF, and an unknown capacitor CX are connected in series between points a and b. What do you know about the equivalent capacitance Cab between a and b? (There could be more than one correct choice.)

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A 1.0-µF capacitor and a 2.0-µF capacitor are connected together, and then that combination is connected across a 3.0-V potential source (a battery). What is the potential difference across the 2.0-µF capacitor if the capacitors are connected (a)in series or (b)in parallel?

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A 6.0-Ω and a 12-Ω resistor are connected in parallel across an ideal 36-V battery. What power is dissipated by the 6.0-Ω resistor?

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A system of four capacitors is connected across a 90-V voltage source as shown in the figure. (a)What is the charge on the 4.0-µF capacitor? (b)What is the charge on the 2.0-µF capacitor? A system of four capacitors is connected across a 90-V voltage source as shown in the figure. (a)What is the charge on the 4.0-µF capacitor? (b)What is the charge on the 2.0-µF capacitor?

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You have three capacitors with capacitances of 4.00 ?F, 7.00 ?F, and 9.00 ?F. What is the equivalent capacitance if they are connected (a)in series and (b)in parallel?

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When two or more different capacitors are connected in series across a potential source, which of the following statements must be true? (There could be more than one correct choice.)

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A resistor, an uncharged capacitor, a dc voltage source, and an open switch are all connected in series. The switch is closed at time t = 0 s. Which one of the following is a correct statement about this circuit?

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For the circuit shown in the figure, the ideal battery has an emf ? = 80 V. The four resistors have resistances of R1=14ΩR _ { 1 } = 14 \Omega R2=21ΩR _ { 2 } = 21 \Omega R3=21ΩR _ { 3 } = 21 \Omega and R4=14ΩR _ { 4 } = 14 \Omega Calculate the rate at which heat is being generated in the resistor R4.  For the circuit shown in the figure, the ideal battery has an emf ? = 80 V. The four resistors have resistances of  R _ { 1 } = 14 \Omega   R _ { 2 } = 21 \Omega   R _ { 3 } = 21 \Omega  and  R _ { 4 } = 14 \Omega  Calculate the rate at which heat is being generated in the resistor R<sub>4</sub>.

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The network shown is assembled with uncharged capacitors X , Y, and Z, with CX=3.0μFC _ { X } = 3.0 \mu \mathrm { F } \text {, } CY=5.0μF\mathrm { C } _ { \mathrm { Y } } = 5.0 \mu \mathrm { F } and CZ=1.0μFC _ { Z } = 1.0 \mu \mathrm { F } The switches S1 and S2 are initially open, and a potential difference Vab = 120 V is applied between points a and b. After the network is assembled, switch S1 is then closed, but switch S2 is kept open. What is the final potential difference across capacitor Z?  The network shown is assembled with uncharged capacitors X , Y, and Z, with  C _ { X } = 3.0 \mu \mathrm { F } \text {, }   \mathrm { C } _ { \mathrm { Y } } = 5.0 \mu \mathrm { F }  and  C _ { Z } = 1.0 \mu \mathrm { F }  The switches S<sub>1</sub> and S<sub>2</sub> are initially open, and a potential difference V<sub>ab</sub> = 120 V is applied between points a and b. After the network is assembled, switch S<sub>1</sub> is then closed, but switch S<sub>2</sub> is kept open. What is the final potential difference across capacitor Z?

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For the circuit shown in the figure, V = 20 V, C = 10 µF, R = 0.80 MΩ, 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 potential difference across the resistor 20 s after closing the switch? For the circuit shown in the figure, V = 20 V, C = 10 µF, R = 0.80 MΩ, 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 potential difference across the resistor 20 s after closing the switch?

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The resistors in the circuit shown in the figure each have a resistance of 700Ω700 \Omega What is the equivalent resistance between points a and b of this combination?  The resistors in the circuit shown in the figure each have a resistance of  700 \Omega  What is the equivalent resistance between points a and b of this combination?

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