Question 1

A multiloop circuit is shown in the figure.It is not necessary to solve the entire circuit.The current I2 is closest to

Accepted Answer

A)  -6 A. 
B)  6 A. 
C)  8 A. 
D)  -8 A. 
E)  zero. 
A)  -6 A. 
B)  6 A. 
C)  8 A. 
D)  -8 A. 
E)  zero. A

Question 2

Three resistors are connected across an ideal 2.0-V DC battery as shown in the figure.
(a)At what rate does the battery supply energy to the resistors?
(b)At what rate is heat produced in the 6.0-Ω resistor?

Accepted Answer

(a)3.0 W (b)0.67 W

Question 3

Two light bulbs,B1 and B2,are connected to a battery having appreciable internal resistance as shown in the figure.What happens to the brightness of bulb B1 when we close the switch S?

Accepted Answer

A)  The brightness of B1 increases permanently. 
B)  The brightness of B1 decreases permanently. 
C)  The brightness of B1 does not change. 
D)  The brightness of B1 increases temporarily but gradually decreases back to its original brightness. 
E)  The brightness of B1 decreases temporarily but gradually increases back to its original brightness. 
A)  The brightness of B1 increases permanently. 
B)  The brightness of B1 decreases permanently. 
C)  The brightness of B1 does not change. 
D)  The brightness of B1 increases temporarily but gradually decreases back to its original brightness. 
E)  The brightness of B1 decreases temporarily but gradually increases back to its original brightness. B

Question 4

A 6.0-μF capacitor is connected in series with= 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?

Accepted Answer

A)  6.5 μA 
B)  2.4 μA 
C)  1.3 μA 
D)  4.7 μA 
E)  9.1 μA 
A)  6.5 μA 
B)  2.4 μA 
C)  1.3 μA 
D)  4.7 μA 
E)  9.1 μA

Question 5

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?

Accepted Answer

(a)0.83 A

Question 6

Two identical resistors of resistance R = 24 Ω and a variable resistor Rx are connected to an ideal battery of voltage V as shown in the figure.What should be the value of the variable resistance Rx to make the voltage across the two parallel resistors equal to   ?

Accepted Answer

A)  4.0 Ω 
B)  24 Ω 
C)  8.0 Ω 
D)  16 Ω 
E)  40 Ω 
A)  4.0 Ω 
B)  24 Ω 
C)  8.0 Ω 
D)  16 Ω 
E)  40 Ω

Question 7

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?

Accepted Answer

A)  25 kΩ 
B)  27 kΩ 
C)  29 kΩ 
D)  31 kΩ 
E)  35 kΩ 
A)  25 kΩ 
B)  27 kΩ 
C)  29 kΩ 
D)  31 kΩ 
E)  35 kΩ

Question 8

Consider the circuit shown in the figure.Note that two currents are shown.Calculate the emfs ε1 and ε3.

Accepted Answer

Question 9

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

Accepted Answer

A)  1 A. 
B)  0.7 A. 
C)  0.5 A. 
D)  0.9 A. 
E)  2 A. 
A)  1 A. 
B)  0.7 A. 
C)  0.5 A. 
D)  0.9 A. 
E)  2 A.

Question 10

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?

Accepted Answer

A)  9.2 s 
B)  2.7 s 
C)  10.2 s 
D)  5.5 s 
E)  1.6 s 
A)  9.2 s 
B)  2.7 s 
C)  10.2 s 
D)  5.5 s 
E)  1.6 s

Question 11

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?

Accepted Answer

A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer 
A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer

Question 12

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 I2 is closest to

Accepted Answer

A)  +0.1 A. 
B)  +0.3 A. 
C)  +0.5 A. 
D)  -0.1 A. 
E)  -0.3 A. 
A)  +0.1 A. 
B)  +0.3 A. 
C)  +0.5 A. 
D)  -0.1 A. 
E)  -0.3 A.

Question 13

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?

Accepted Answer

A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer 
A)  50.0 Ω in series with the galvanometer 
B)  50.0 Ω in parallel with the galvanometer 
C)  75.0 Ω in parallel with the galvanometer 
D)  100 Ω in series with the galvanometer 
E)  100 Ω in parallel with the galvanometer

Question 14

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?

Accepted Answer

A)  250,000 nJ 
B)  15,000 kJ 
C)  25 µJ 
D)  890 nJ 
A)  250,000 nJ 
B)  15,000 kJ 
C)  25 µJ 
D)  890 nJ

Question 15

For the circuit shown in the figure,what is the current through resistor R1?

Accepted Answer

A)  0.071 A 
B)  0.13 A 
C)  0.029 A 
D)  0.016 A 
A)  0.071 A 
B)  0.13 A 
C)  0.029 A 
D)  0.016 A

Question 16

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?

Accepted Answer

(a)36.0 Ω (b)2.40 Ω
(c)Connect the 8.00-

Question 17

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

Accepted Answer

A)  0.32 A 
B)  0.11 A 
C)  0.29 A 
D)  0.61 A 
E)  0.89 A 
A)  0.32 A 
B)  0.11 A 
C)  0.29 A 
D)  0.61 A 
E)  0.89 A

Question 18

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

Accepted Answer

A)  +3 V. 
B)  +19 V. 
C)  -3 V. 
D)  -10 V. 
E)  -1 V. 
A)  +3 V. 
B)  +19 V. 
C)  -3 V. 
D)  -10 V. 
E)  -1 V.

Question 19

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

Accepted Answer

A)  0.043 A 
B)  1.5 A 
C)  0.028 A 
D)  0.086 A 
A)  0.043 A 
B)  1.5 A 
C)  0.028 A 
D)  0.086 A

Question 20

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.

Accepted Answer

(a)2.8 A (

Exam 26: Direct-Current Circuits

A multiloop circuit is shown in the figure.It is not necessary to solve the entire circuit.The current I2 is closest to

Three resistors are connected across an ideal 2.0-V DC battery as shown in the figure. (a)At what rate does the battery supply energy to the resistors? (b)At what rate is heat produced in the 6.0-Ω resistor?

Two light bulbs,B1 and B2,are connected to a battery having appreciable internal resistance as shown in the figure.What happens to the brightness of bulb B1 when we close the switch S?

A 6.0-μF capacitor is connected in series with= 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?

Two identical resistors of resistance R = 24 Ω and a variable resistor Rx are connected to an ideal battery of voltage V as shown in the figure.What should be the value of the variable resistance Rx to make the voltage across the two parallel resistors equal to ?

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?

Consider the circuit shown in the figure.Note that two currents are shown.Calculate the emfs ε1 and ε3.

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 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?

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?

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 I2 is closest to

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 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?

For the circuit shown in the figure,what is the current through resistor R1?

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

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

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 1.0-Ω resistor. (b)the 3.0-Ω resistor. (c)the 4.0-Ω resistor.

Units,physical Quantities,and Vectors

Motion Along a Straight Line

Motion in Two or Three Dimensions

Newtons Laws of Motion

Applying Newtons Laws

Work and Kinetic Energy

Potential Energy and Energy Conservation

Momentum,impulse,and Collisions

Rotation of Rigid Bodies

Dynamics of Rotational Motion

Equilibrium and Elasticity

Fluid Mechanics

Gravitation

Periodic Motion

Mechanical Waves

Sound and Hearing

Temperature and Heat

Thermal Properties of Matter

The First Law of Thermodynamics

The Second Law of Thermodynamics

Electric Charge and Electric Field

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current,resistance,and Electromotive Force

Magnetic Field and Magnetic Forces

Sources of Magnetic Field

Electromagnetic Induction

Inductance

Alternating Current

Electromagnetic Waves

The Nature and Propagation of Light

Geometric Optics

Interference

Diffraction

Relativity

Photons: Light Waves Behaving As Particles

Particles Behaving As Waves

Quantum Mechanics

Atomic Structure

Molecules and Condensed Matter

Nuclear Physics

Particle Physics and Cosmology

Filters

A multiloop circuit is shown in the figure.It is not necessary to solve the entire circuit.The current I₂ is closest to

Two light bulbs,B₁ and B₂,are connected to a battery having appreciable internal resistance as shown in the figure.What happens to the brightness of bulb B₁ when we close the switch S?

Two identical resistors of resistance R = 24 Ω and a variable resistor R_x are connected to an ideal battery of voltage V as shown in the figure.What should be the value of the variable resistance R_x to make the voltage across the two parallel resistors equal to ?

Consider the circuit shown in the figure.Note that two currents are shown.Calculate the emfs ε₁ and ε₃.

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 I₂ is closest to

For the circuit shown in the figure,what is the current through resistor R₁?

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

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