Exam 23: Circuits

A charged capacitor is connected in series with a resistor and an open switch. At time t = 0 s, the switch is closed. Which of the graphs below best describes the potential difference V across the capacitor as a function of time t?

For the circuit shown in the figure, R₁ = 50 Ω, R₂ = 20 Ω, R₃ = 35 Ω, R₄ = 10 Ω, R₅ = 68 Ω, I₁ = 0.111 A, I₂ = 0.142 A, and the batteries are ideal. (a) Determine V₁ and V₂. (b) What is the potential difference across R₄?

The network shown is assembled with uncharged capacitors X , Y, and Z, with C_X = 4.0 μF, C_Y = 6.0 μF, and C_Z = 5.0 μF. The switches S₁ and S₂ are initially open, and a potential difference V_ab = 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?

Kirchhoff's loop rule is a statement of

Five 2.0-Ω resistors are connected as shown in the figure. What is the equivalent resistance of this combination between points a and b?

Determine the current in the 12-Ω resistor for the circuit shown in the figure assuming that the batteries are ideal.

Kirchhoff's junction rule is a statement of

When different resistors are connected in parallel across an ideal battery, we can be certain that

Two resistors having resistances of 5.0 Ω and 9.0 Ω are connected in parallel. A 4.0-Ω resistor is then connected in series with the parallel combination. An ideal 6.0-V battery is then connected across the series-parallel combination. What is the current through the 9.0-Ω resistor?

What current flows from the battery in the circuit shown in the figure? The battery is ideal, and all the numbers are accurate to two significant figures.

A 9-V battery is hooked up to two resistors in series. 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. Through which resistor is energy being dissipated at the higher rate?

When unequal resistors are connected in series across an ideal battery,

Draw a circuit consisting of a battery connected to two resistors, R₁ and R₂, in series with each other and a capacitor C connected across the resistors.

An ideal 10.0-V dc is connected across a $590.0 - \Omega$ resistor in series with an $840.0 - \Omega$ resistor. What is the potential drop across the $590.0 \Omega$ resistor?

The following three appliances are connected in parallel across an ideal 120-V dc power source: 1200-W toaster, 650-W coffee pot, and 600-W microwave. If all were operated at the same time what total current would they draw from the source?

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?

If emf of the ideal battery is V = 4.0 V, what is the current through R₆ for the circuit shown in the figure?

A system of four capacitors is connected across a 90-V voltage source as shown in the figure. What is the equivalent capacitance of this system?

For the circuit shown in the figure, the current in the 8.0-Ω resistor is 0.50A. What is the current in the 2.0-Ω resistor? All the numbers shown are accurate to two significant figures.

An uncharged capacitor is connected in series with a resistor, a dc battery, and an open switch. At time t = 0 s, the switch is closed. Which of the graphs below best describes the potential difference V across the resistor as a function of time t?