Exam 28: Fundamentals of Circuits

A light bulb is connected in the circuit shown in the figure with the switch S open and the capacitor uncharged.The battery has no appreciable internal resistance.Which one of the following graphs best describes the brightness B of the bulb as a function of time t after closing the switch?

A galvanometer with a resistance of 40.0 Ω deflects full scale at a current of 2.0 mA.What resistance should be used with this galvanometer in order to construct a voltmeter that can read a maximum of 50 V?

In the circuit shown in the figure,two 360.0-Ω resistors are connected in series with an ideal source of emf.A voltmeter with internal resistance of 6350 Ω is connected across one of the resistors and reads 3.23 V.Find the emf of the source.

For the circuit shown in the figure,what is the current through resistor R₃?

For the circuit shown in the figure,determine the current in (a)the 7.0-Ω resistor. (b)the 8.0-Ω resistor. (c)the 4.0-Ω resistor.

A 6.0-μF capacitor is connected in series with a 5.0 MΩ resistor,and this combination is connected across an ideal 15-V DC battery.What is the current in the circuit when the capacitor has reached 20% of its maximum charge?

For the circuit shown in the figure,the current in the 8-Ω resistor is 0.50 A,and all quantities are accurate to 2 significant figures.What is the current in the 2-Ω resistor?

For the circuit shown in the figure,all quantities are accurate to 2 significant figures.What is the value of the current I₁?

A resistor is made out of a long wire having a length L.Each end of the wire is attached to a terminal of a battery providing a constant voltage V₀.A current I flows through the wire.If the wire were cut in half,making two wires of length L/2,and both wires were attached to the battery (the end of both wires attached to one terminal,and the other ends attached to the other terminal),what would be the total current flowing through the two wires?

A multiloop circuit is shown in the figure.Some circuit quantities are not labeled.It is not necessary to solve the entire circuit.The current I₁ is closest to

In the figure a current of 6.0 A is drawn from the battery.What is the terminal voltage V_ab of the battery?

Two unknown resistors are connected together.When they are connected in series their equivalent resistance is 15 Ω.When they are connected in parallel,their equivalent resistance is 3.3 Ω.What are the resistances of these resistors?

For the circuit shown in the figure,I = 0.50 A and R = 12 Ω.What is the value of the emf ε?

An uncharged 1.0-μF capacitor is connected in series with a resistor,an ideal battery,and an open switch.What is the voltage across the capacitor after closing the switch?

For the circuit shown in the figure,all quantities are accurate to 3 significant figures.What is the power dissipated in the 2-Ω resistor?

A 4.0-μF capacitor that is initially uncharged is connected in series with a 4.0-kΩ resistor and an ideal 17.0-V battery.How much energy is stored in the capacitor 17 ms after the battery has been connected?

Thirteen resistors are connected across points A and B as shown in the figure.If all the resistors are accurate to 2 significant figures,what is the equivalent resistance between points A and B?

A galvanometer G has an internal resistance r_g.A VOLTMETER is constructed by incorporating the galvanometer and an additional resistance R_s.Which one of the figures below is the most appropriate circuit diagram for the voltmeter?

For the circuit shown in the figure,the switch S is initially open and the capacitor is uncharged.The switch is then closed at time t = 0.How many seconds after closing the switch will the energy stored in the capacitor be equal to 50.2 mJ?

In the circuit shown in the figure,an ideal ohmmeter is connected across ab with the switch S open.All the connecting leads have negligible resistance.The reading of the ohmmeter will be closest to