Question 1

A difference between electric and gravitational forces is that electric forces include

Accepted Answer

A) separation distance. 
B) repulsive interactions. 
C) the inverse-square law. 
D) infinite range. 
E) none of the above 
A) separation distance. 
B) repulsive interactions. 
C) the inverse-square law. 
D) infinite range. 
E) none of the above

Question 2

A length of wire has resistance R. Two of these same-length wires braided together have a resistance

Accepted Answer

A) R/2. 
B) R. 
C) 2R. 
D) none of the above 
A) R/2. 
B) R. 
C) 2R. 
D) none of the above

Question 3

Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have

Accepted Answer

A) more resistance. 
B) less resistance. 
C) the same resistance. 
A) more resistance. 
B) less resistance. 
C) the same resistance.

Question 4

A rubber rod rubbed with fur becomes

Accepted Answer

A) positively charged. 
B) negatively charged. 
C) both 
D) neither. 
A) positively charged. 
B) negatively charged. 
C) both 
D) neither.

Question 5

When you remove electrons from a metal cup, the cup becomes

Accepted Answer

A) negatively charged. 
B) positively charged. 
C) ionized. 
A) negatively charged. 
B) positively charged. 
C) ionized.

Question 6

When we say an appliance "uses up" electricity, we actually are saying that

Accepted Answer

A) current disappears. 
B) electric charges are dissipated. 
C) the main power supply voltage is lowered. 
D) electrons are taken out of the circuit and put somewhere else. 
E) electrical energy changes to thermal energy. 
A) current disappears. 
B) electric charges are dissipated. 
C) the main power supply voltage is lowered. 
D) electrons are taken out of the circuit and put somewhere else. 
E) electrical energy changes to thermal energy.

Question 7

A balloon will stick to a wooden wall if the balloon is charged

Accepted Answer

A) negatively. 
B) positively. 
C) either 
D) neither 
A) negatively. 
B) positively. 
C) either 
D) neither

Question 8

Which is more dangerous, touching a faulty 120-V light fixture, or a Van de Graaff generator charged to 100,000 V?

Accepted Answer

A) light fixture 
B) generator 
C) both equally 
A) light fixture 
B) generator 
C) both equally

Question 9

The electric current in a copper wire is normally composed of

Accepted Answer

A) electrons. 
B) protons. 
C) ions. 
D) all or any of the above 
A) electrons. 
B) protons. 
C) ions. 
D) all or any of the above

Question 10

If you do 10 J of work to push 1 coulomb of charge into an electric field, its voltage with respect to its starting position is

Accepted Answer

A) less than 10 V. 
B) 10 V. 
C) more than 10 V. 
A) less than 10 V. 
B) 10 V. 
C) more than 10 V.

Question 11

Which of these lamps is the longer lasting in a common circuit?

Accepted Answer

A) incandescent lamp 
B) compact fluorescent lamp 
C) light-emitting diode 
D) all about the same 
A) incandescent lamp 
B) compact fluorescent lamp 
C) light-emitting diode 
D) all about the same

Question 12

The electric force between charges depends on the

Accepted Answer

A) magnitude of electric charges. 
B) separation distance between electric charges. 
C) both 
D) none of the above 
A) magnitude of electric charges. 
B) separation distance between electric charges. 
C) both 
D) none of the above

Question 13

Two charges separated by 1 m exert a 1.0-N force on each other. If the charges are pulled to a 3-m separation distance, the force on each charge will be

Accepted Answer

A) 0.33 N. 
B) 0.11 N. 
C) 0 N. 
D) 3 N. 
E) 9 N. 
A) 0.33 N. 
B) 0.11 N. 
C) 0 N. 
D) 3 N. 
E) 9 N.

Question 14

A negatively-charged balloon touching a wooden wall

Accepted Answer

A) pulls positive charge on the wall surface toward it. 
B) pushes negative charge in the wall away from it. 
C) polarizes molecules in the wall. 
D) all of the above 
E) none of the above 
A) pulls positive charge on the wall surface toward it. 
B) pushes negative charge in the wall away from it. 
C) polarizes molecules in the wall. 
D) all of the above 
E) none of the above

Question 15

A coulomb of charge passing through a 6-V battery supplies

Accepted Answer

A) 6 joules. 
B) 6 amperes. 
C) 6 ohms. 
D) 6 watts. 
E) 6 newtons. 
A) 6 joules. 
B) 6 amperes. 
C) 6 ohms. 
D) 6 watts. 
E) 6 newtons.

Question 16

A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?

Accepted Answer

A) the electron 
B) the proton 
C) both equally 
D) neither 
A) the electron 
B) the proton 
C) both equally 
D) neither

Question 17

When two lamps are connected in series to a battery, the electric resistance that the battery senses is

Accepted Answer

A) more than the resistance of either lamp. 
B) less than the resistance of either lamp. 
C) none of the above 
A) more than the resistance of either lamp. 
B) less than the resistance of either lamp. 
C) none of the above

Question 18

Every proton in the universe is surrounded by its own

Accepted Answer

A) electric field. 
B) gravitational field. 
C) both 
D) none of the above 
A) electric field. 
B) gravitational field. 
C) both 
D) none of the above

Question 19

A circuit is powered with a battery. It is best to say that electrons flow

Accepted Answer

A) from the battery and into the circuit. 
B) from the negative terminal to the positive terminal of the battery. 
C) after a couple seconds passes. 
D) through both the battery and the devices making up the circuit. 
E) none of the above 
A) from the battery and into the circuit. 
B) from the negative terminal to the positive terminal of the battery. 
C) after a couple seconds passes. 
D) through both the battery and the devices making up the circuit. 
E) none of the above

Question 20

How much current is in a 60-W light bulb connected to 120 V?

Accepted Answer

A) 0.25 A 
B) 0.5 A 
C) 2 A 
D) 4 A 
E) more than 4 A 
A) 0.25 A 
B) 0.5 A 
C) 2 A 
D) 4 A 
E) more than 4 A

Exam 8: Static and Current Electricity

A difference between electric and gravitational forces is that electric forces include

A length of wire has resistance R. Two of these same-length wires braided together have a resistance

Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have

A rubber rod rubbed with fur becomes

When you remove electrons from a metal cup, the cup becomes

When we say an appliance "uses up" electricity, we actually are saying that

A balloon will stick to a wooden wall if the balloon is charged

Which is more dangerous, touching a faulty 120-V light fixture, or a Van de Graaff generator charged to 100,000 V?

The electric current in a copper wire is normally composed of

If you do 10 J of work to push 1 coulomb of charge into an electric field, its voltage with respect to its starting position is

Which of these lamps is the longer lasting in a common circuit?

The electric force between charges depends on the

Two charges separated by 1 m exert a 1.0-N force on each other. If the charges are pulled to a 3-m separation distance, the force on each charge will be

A negatively-charged balloon touching a wooden wall

A coulomb of charge passing through a 6-V battery supplies

A proton and an electron are placed in an electric field. Which undergoes the greater acceleration?

When two lamps are connected in series to a battery, the electric resistance that the battery senses is

Every proton in the universe is surrounded by its own

A circuit is powered with a battery. It is best to say that electrons flow

How much current is in a 60-W light bulb connected to 120 V?

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Timereading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: the Nature of Science

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