In the circuit shown in the figure,four identical resistors labeled A to D are connected to a battery as shown.S1 and S2 are switches.Which of the following actions would result in the GREATEST amount of current through resistor A?

A) closing both switches B) closing S1 only C) closing S2 only D) leaving both switches open as shown. A) closing both switches B) closing S1 only C) closing S2 only D) leaving both switches open as shown.

Exam 28: Fundamentals of Circuits

A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA.What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA,and how should this resistor be connected to the galvanometer?

(Multiple Choice)

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Question 41

The emf and the internal resistance of a battery are shown in the figure.If a current of 7.8 A is established through the battery from b to a,what is the terminal voltage V_ab of the battery?

(Multiple Choice)

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Question 42

A galvanometer has an internal resistance of 100 Ω and deflects full-scale at a current of 2.00 mA.What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV,and how should this resistor be connected to the galvanometer?

(Multiple Choice)

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Question 43

A certain electric furnace consumes 24 kW when it is connected to a 240-V line.What is the resistance of the furnace?

(Multiple Choice)

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Question 44

Four resistors are connected across an 8-V DC battery as shown in the figure.The current through the 9-Ω resistor is closest to

(Multiple Choice)

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Question 45

A 400-W computer (including the monitor)is turned on for 8.0 hours per day.If electricity costs 10¢ per kWh,how much does it cost to run the computer annually for a typical 365-day year?

(Multiple Choice)

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Question 46

The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals.What happens to the brightness of lightbulb 1 when the switch S is closed?

(Multiple Choice)

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Question 47

A 5.0-Ω resistor and a 9.0-Ω resistor are connected in parallel.A 4.0-Ω resistor is then connected in series with this parallel combination.An ideal 6.0-V battery is then connected across the series-parallel combination of the three resistors.What is the current through (a)the 4.0-Ω resistor? (b)the 5.0-Ω resistor? (c)the 9.0-Ω resistor?

(Short Answer)

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Question 48

A 4.0-mF capacitor is discharged through a 4.0-kΩ resistor.How long will it take for the capacitor to lose half its initial stored energy?

(Multiple Choice)

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Question 49

For the circuit shown in the figure,determine the current in (a)the 1.0-Ω resistor. (b)the 3.0-Ω resistor. (c)the 4.0-Ω resistor.

(Short Answer)

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Question 50

In the circuit shown in the figure,four identical resistors labeled A to D are connected to a battery as shown.S₁ and S₂ are switches.Which of the following actions would result in the GREATEST amount of current through resistor A?

(Multiple Choice)

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Question 51

A 4.00-Ω resistor,an 8.00-Ω resistor,and a 24.0-Ω resistor are connected together. (a)What is the maximum resistance that can be produced using all three resistors? (b)What is the minimum resistance that can be produced using all three resistors? (c)How would you connect these three resistors to obtain a resistance of 10.0 Ω? (d)How would you connect these three resistors to obtain a resistance of 8.00 Ω?

(Essay)

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Question 52

For the circuit shown in the figure,the switch S is initially open and the capacitor voltage is 80 V.The switch is then closed at time t = 0.How long after closing the switch will the current in the resistor be 7.0 µA?

(Multiple Choice)

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Question 53

A 110-V hair dryer is rated at 1200 W.What current will it draw when operating from a 110-V electrical outlet?

(Multiple Choice)

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Question 54

When a 100-Ω resistor is connected across the terminals of a battery of emf ε and internal resistance r,the battery delivers 0.794 W of power to the 100-Ω resistor.When the 100-Ω resistor is replaced by a 200-Ω resistor,the battery delivers 0.401 W of power to the 200-Ω resistor.What are the emf and internal resistance of the battery?

(Multiple Choice)

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Question 55

The emf and the internal resistance of a battery are as shown in the figure.If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery,what is the power dissipated by the resistor R?

(Multiple Choice)

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Question 56

For the circuit shown in the figure,the switch S is initially open and the capacitor voltage is 80 V.The switch is then closed at time t = 0.What is the charge on the capacitor when the current in the circuit is 33 μA?

(Multiple Choice)

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Question 57

An RC circuit is connected across an ideal DC voltage source through an open switch.The switch is closed at time t = 0 s.Which of the following statements regarding the circuit are correct? (There may be more than one correct choice.)

(Multiple Choice)

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Question 58

As more resistors are added in parallel across a constant voltage source,the power supplied by the source

(Multiple Choice)

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Question 59

In the circuit shown in the figure,all the lightbulbs are identical.Which of the following is the correct ranking of the brightness of the bulbs?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 68

Exam 28: Fundamentals of Circuits

A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA.What size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 mA,and how should this resistor be connected to the galvanometer?

The emf and the internal resistance of a battery are shown in the figure.If a current of 7.8 A is established through the battery from b to a,what is the terminal voltage Vab of the battery?

A galvanometer has an internal resistance of 100 Ω and deflects full-scale at a current of 2.00 mA.What size resistor should be added to it to convert it to a millivoltmeter capable of reading up to 400 mV,and how should this resistor be connected to the galvanometer?

A certain electric furnace consumes 24 kW when it is connected to a 240-V line.What is the resistance of the furnace?

Four resistors are connected across an 8-V DC battery as shown in the figure.The current through the 9-Ω resistor is closest to

A 400-W computer (including the monitor)is turned on for 8.0 hours per day.If electricity costs 10¢ per kWh,how much does it cost to run the computer annually for a typical 365-day year?

The figure shows three identical lightbulbs connected to a battery having a constant voltage across its terminals.What happens to the brightness of lightbulb 1 when the switch S is closed?

A 4.0-mF capacitor is discharged through a 4.0-kΩ resistor.How long will it take for the capacitor to lose half its initial stored energy?

For the circuit shown in the figure,determine the current in (a)the 1.0-Ω resistor. (b)the 3.0-Ω resistor. (c)the 4.0-Ω resistor.

In the circuit shown in the figure,four identical resistors labeled A to D are connected to a battery as shown.S1 and S2 are switches.Which of the following actions would result in the GREATEST amount of current through resistor A?

For the circuit shown in the figure,the switch S is initially open and the capacitor voltage is 80 V.The switch is then closed at time t = 0.How long after closing the switch will the current in the resistor be 7.0 µA?

A 110-V hair dryer is rated at 1200 W.What current will it draw when operating from a 110-V electrical outlet?

The emf and the internal resistance of a battery are as shown in the figure.If a current of 8.3 A is drawn from the battery when a resistor R is connected across the terminals ab of the battery,what is the power dissipated by the resistor R?

For the circuit shown in the figure,the switch S is initially open and the capacitor voltage is 80 V.The switch is then closed at time t = 0.What is the charge on the capacitor when the current in the circuit is 33 μA?

An RC circuit is connected across an ideal DC voltage source through an open switch.The switch is closed at time t = 0 s.Which of the following statements regarding the circuit are correct? (There may be more than one correct choice.)

As more resistors are added in parallel across a constant voltage source,the power supplied by the source

In the circuit shown in the figure,all the lightbulbs are identical.Which of the following is the correct ranking of the brightness of the bulbs?

Concepts of Motion

Kinematics in One Dimension

Vectors and Coordinate Systems

Kinematics in Two Dimensions

Force and Motion

Dynamics I: Motion Along a Line

Newtons Third Law

Dynamics II: Motion in a Plane

Work and Kinetic Energy

Interactions and Potential Energy

Impulse and Momentum

Rotation of a Rigid Body

Newtons Theory of Gravity

Fluids and Elasticity

Oscillations

Traveling Waves

Superposition

A Macroscopic Description of Matter

Work, heat, and the First Law of Thermodynamics

The Micromacro Connection

Heat Engines and Refrigerators

Electric Charges and Forces

The Electric Field

Gausss Law

The Electric Potential

Potential and Field

Current and Resistance

The Magnetic Field

Electromagnetic Induction

Electromagnetic Fields and Waves

Ac Circuits

Wave Optics

Ray Optics

Optical Instruments

Relativity

The Foundations of Modern Physics

Quantization

Wave Functions and Uncertainty

One-Dimensional Quantum Mechanics

Atomic Physics

Nuclear Physics

Filters

The emf and the internal resistance of a battery are shown in the figure.If a current of 7.8 A is established through the battery from b to a,what is the terminal voltage V_ab of the battery?

In the circuit shown in the figure,four identical resistors labeled A to D are connected to a battery as shown.S₁ and S₂ are switches.Which of the following actions would result in the GREATEST amount of current through resistor A?