Filters
Question type
Study Flashcards

A kilowatt-hour is equivalent to


A) 1000 W.
B) 3600 J.
C) 3,600,000 J/s.
D) 3,600,000 J.
E) 3600 J/s

F) A) and B)
G) A) and E)

Correct Answer

verifed

verified

A 22-A current flows into a parallel combination of 4.0-Ω,6.0-Ω,and 12-Ω resistors.What current flows through the 12-Ω resistor?


A) 18 A
B) 11 A
C) 7.3 A
D) 3.7 A

E) A) and D)
F) C) and D)

Correct Answer

verifed

verified

During a period of high power demand,the voltage output of the power company is reduced by 5.0%.By what percentage is the power in a resistor decreased?


A) 2.5%
B) 5.0%
C) 10%
D) 15%
E) 90%

F) A) and B)
G) A) and E)

Correct Answer

verifed

verified

The nichrome heating element in an electric drier operates on 240 V and generates thermal energy at the rate of 2.0 kW.The heating element shorts out and,in repairing it,the repairman shortens the nichrome wire by 10%.(Assume the temperature is unchanged.In reality,the resistivity of the wire will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element?


A) The power is still 2.0 kW.
B) The power increases to 2.2 kW.
C) The power decreases to 1.8 kW.
D) None of the given answers is correct.

E) B) and D)
F) B) and C)

Correct Answer

verifed

verified

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?


A) 4.0 A
B) 5.0 A
C) 10 A
D) 20 A

E) A) and D)
F) B) and C)

Correct Answer

verifed

verified

Kirchhoff's loop rule is a statement of


A) the law of conservation of momentum.
B) the law of conservation of charge.
C) the law of conservation of energy.
D) the law of conservation of angular momentum.
E) Newton's second law.

F) C) and D)
G) B) and E)

Correct Answer

verifed

verified

Draw a circuit with two batteries,a resistor between them,and a capacitor in parallel with the resistor.The batteries are connected negative pole to positive pole.


A) Draw a circuit with two batteries,a resistor between them,and a capacitor in parallel with the resistor.The batteries are connected negative pole to positive pole. A) B) C) D)
B) Draw a circuit with two batteries,a resistor between them,and a capacitor in parallel with the resistor.The batteries are connected negative pole to positive pole. A) B) C) D)
C) Draw a circuit with two batteries,a resistor between them,and a capacitor in parallel with the resistor.The batteries are connected negative pole to positive pole. A) B) C) D)
D) Draw a circuit with two batteries,a resistor between them,and a capacitor in parallel with the resistor.The batteries are connected negative pole to positive pole. A) B) C) D)

E) A) and B)
F) B) and C)

Correct Answer

verifed

verified

You buy a AA battery in the store,and it is marked 1.5 V.If this marking is strictly accurate,while this battery is fresh


A) its terminal voltage will be more than 1.5 V when it is used in a circuit.
B) its terminal voltage will be less than 1.5 V when it is used in a circuit.
C) its terminal voltage will be 1.5 V when it is used in a circuit.

D) A) and B)
E) A) and C)

Correct Answer

verifed

verified

If emf of the ideal battery is V = 4.0 V,what is the current through R6 for the circuit shown in the figure? If emf of the ideal battery is V = 4.0 V,what is the current through R<sub>6</sub> for the circuit shown in the figure? A) 0.0077 A B) 0.017 A C) 0.040 A D) 4.0 A


A) 0.0077 A
B) 0.017 A
C) 0.040 A
D) 4.0 A

E) B) and C)
F) A) and C)

Correct Answer

verifed

verified

The figure shows electrons passing through a resistor.The arrow shows the direction in which the electrons are moving.Which of the following statements are correct? (There could be more than one correct choice.) The figure shows electrons passing through a resistor.The arrow shows the direction in which the electrons are moving.Which of the following statements are correct? (There could be more than one correct choice.) A) The electrons are moving slower at point b than at point a. B) The electric potential is higher at point b than at point a. C) The electric potential is lower at point b than at point a. D) The system electrons-metal is losing electric potential energy as the electrons move through the resistor from a to b. E) The speed of the electrons at point b is the same as it is at point a.


A) The electrons are moving slower at point b than at point a.
B) The electric potential is higher at point b than at point a.
C) The electric potential is lower at point b than at point a.
D) The system electrons-metal is losing electric potential energy as the electrons move through the resistor from a to b.
E) The speed of the electrons at point b is the same as it is at point a.

F) A) and D)
G) C) and D)

Correct Answer

verifed

verified

The power rating of a 400-Ω resistor is 0.25 W.What is the maximum voltage you can safely connect across its ends?


A) 10 V
B) 20 V
C) 30 V
D) 40 V
E) 50 V

F) A) and E)
G) C) and D)

Correct Answer

verifed

verified

What potential difference is required across an 8.0-Ω resistor to cause a 2.0 A current through it?

Correct Answer

verifed

verified

A number of resistors are connected across points A and B as shown in the figure.What is the equivalent resistance between points A and B? A number of resistors are connected across points A and B as shown in the figure.What is the equivalent resistance between points A and B? A) 4 Ω B) 6 Ω C) 8 Ω D) 10 Ω E) 12 Ω


A) 4 Ω
B) 6 Ω
C) 8 Ω
D) 10 Ω
E) 12 Ω

F) C) and D)
G) A) and E)

Correct Answer

verifed

verified

When there is electric current through an ionic liquid such as salty water,the moving charges are


A) only protons.
B) only electrons.
C) only negative ions.
D) only positive ions.
E) both positive and negative ions.

F) A) and E)
G) C) and D)

Correct Answer

verifed

verified

A multiloop circuit is shown in the figure,but some quantities are not labeled.Find the current I1 if the batteries are ideal.(It is not necessary to solve the entire circuit.) A multiloop circuit is shown in the figure,but some quantities are not labeled.Find the current I<sub>1</sub> if the batteries are ideal.(It is not necessary to solve the entire circuit.) A) 0 A B) +0.2 A C) +0.4 A D) -0.2 A E) -0.4 A


A) 0 A
B) +0.2 A
C) +0.4 A
D) -0.2 A
E) -0.4 A

F) B) and D)
G) All of the above

Correct Answer

verifed

verified

A multiloop circuit is shown in the figure,but some quantities are not labeled.Find the current I2 if the batteries are ideal.(It is not necessary to solve the entire circuit.) A multiloop circuit is shown in the figure,but some quantities are not labeled.Find the current I<sub>2</sub> if the batteries are ideal.(It is not necessary to solve the entire circuit.) 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

F) A) and D)
G) C) and E)

Correct Answer

verifed

verified

A battery has an emf ε = 12 V and an internal resistance r = 2.0 Ω,as shown in the figure.When a 3.0-Ω cable is connected across the battery terminals a and b,the rate at which chemical energy in the battery is depleted is closest to A battery has an emf ε = 12 V and an internal resistance r = 2.0 Ω,as shown in the figure.When a 3.0-Ω cable is connected across the battery terminals a and b,the rate at which chemical energy in the battery is depleted is closest to A) 24 W. B) 27 W. C) 29 W. D) 32 W. E) 34 W.


A) 24 W.
B) 27 W.
C) 29 W.
D) 32 W.
E) 34 W.

F) B) and D)
G) A) and C)

Correct Answer

verifed

verified

For the circuit shown in the figure,both batteries are ideal.What is the current through the solid wire connecting the upper left and lower left corners of the circuit? For the circuit shown in the figure,both batteries are ideal.What is the current through the solid wire connecting the upper left and lower left corners of the circuit? A) 0.25 A B) 0.50 A C) 0.75 A D) 1.0 A


A) 0.25 A
B) 0.50 A
C) 0.75 A
D) 1.0 A

E) A) and B)
F) A) and C)

Correct Answer

verifed

verified

For the circuit shown in the figure,what is the power dissipated in the 2.0-Ω resistor? All the numbers shown are accurate to three significant figures. For the circuit shown in the figure,what is the power dissipated in the 2.0-Ω resistor? All the numbers shown are accurate to three significant figures. A) 5.33 W B) 8.00 W C) 6.67 W D) 2.67 W E) 3.56 W


A) 5.33 W
B) 8.00 W
C) 6.67 W
D) 2.67 W
E) 3.56 W

F) A) and B)
G) D) and E)

Correct Answer

verifed

verified

A 120-m long metal wire having a resistivity of 1.68 × 10-8 Ω ∙ m has a resistance of 6.0 Ω.What is the diameter of the wire?


A) 0.065 mm
B) 0.65 mm
C) 0.65 cm
D) 0.65 m

E) All of the above
F) C) and D)

Correct Answer

verifed

verified

Showing 181 - 200 of 225

Related Exams

Exam 1

Introduction

32 Questions

Exam 2

Kinematics: Motion in One Dimension

162 Questions

Exam 3

Newtonian Mechanics

54 Questions

Exam 4

Applying Newtons Laws

178 Questions

Exam 5

Circular Motion

119 Questions

Exam 6

Impulse and Linear Momentum

82 Questions

Exam 7

Work and Energy

191 Questions

Exam 8

Extended Bodies at Rest

59 Questions

Exam 9

Rotational Motion

124 Questions

Exam 10

Gases

84 Questions

Exam 11

Static Fluids

65 Questions

Exam 12

Fluids in Motion

30 Questions

Exam 13

First Law of Thermodynamics

119 Questions

Exam 14

Second Law of Thermodynamics

70 Questions

Exam 15

Electric Charge force and Energy

78 Questions

Exam 16

The Electric Field

151 Questions

Exam 18

Magnetism

136 Questions

Exam 19

Electromagnetic Induction

99 Questions

Exam 20

Vibrational Motion

94 Questions

Exam 21

Mechanical Waves

155 Questions

Exam 22

Reflection and Refraction

36 Questions

Exam 23

Mirrors and Lenses

221 Questions

Exam 24

Wave Optics

135 Questions

Exam 25

Electromagnetic Waves

79 Questions

Exam 26

Special Relativity

124 Questions

Exam 27

Quantum Optics

100 Questions

Exam 28

Atomic Physics

141 Questions

Exam 29

Nuclear Physics

155 Questions

Exam 30

Particle Physics

21 Questions

Show Answer