Question 1

Two lamps,a thick-filament one and a thin-filament one,are connected in parallel to a battery.The current is greater in the lamp with the

Accepted Answer

A) thick filament. 
B) thin filament. 
C) same in each 
A) thick filament. 
B) thin filament. 
C) same in each A

Question 2

Current that is typically 60 hertz is

Accepted Answer

A) direct current. 
B) alternating current. 
C) either of these 
D) neither of these 
A) direct current. 
B) alternating current. 
C) either of these 
D) neither of these B

Question 3

The electric field between oppositely-charged parallel plates is

Accepted Answer

A) uniform. 
B) stronger at the ends. 
C) composed of field lines curved in opposite directions. 
D) none of the above 
A) uniform. 
B) stronger at the ends. 
C) composed of field lines curved in opposite directions. 
D) none of the above A

Question 4

Two charged particles repel each other with a force F.If the charge of one particle is doubled and the distance between them is doubled,the force will be

Accepted Answer

A) F. 
B) 2 F. 
C) F/2. 
D) F/4. 
E) none of the above 
A) F. 
B) 2 F. 
C) F/2. 
D) F/4. 
E) none of the above

Question 5

Which of these,all of the same length,has the greater electrical resistance?

Accepted Answer

A) a copper rod 
B) an iron rod 
C) a rubber rod 
D) all about the same 
E) none of the above 
A) a copper rod 
B) an iron rod 
C) a rubber rod 
D) all about the same 
E) none of the above

Question 6

Which of these does not have an electrical charge?

Accepted Answer

A) proton 
B) electron 
C) neutron 
D) all of the above 
E) none of the above 
A) proton 
B) electron 
C) neutron 
D) all of the above 
E) none of the above

Question 7

Which will do more damage,plugging a 120-V hair dryer into a 240-V circuit or plugging a 220-V hair dryer into a 120-V circuit? Explain.

Accepted Answer

Damage generally occurs from excess heat

Question 8

The electric field lines between a pair of equal and opposite charges are

Accepted Answer

A) directed from positive to negative. 
B) more concentrated closer to the charges. 
C) vectors,with patterns resulting from the inverse-square law. 
D) all of the above 
E) none of the above 
A) directed from positive to negative. 
B) more concentrated closer to the charges. 
C) vectors,with patterns resulting from the inverse-square law. 
D) all of the above 
E) none of the above

Question 9

The pair of protons in the nucleus of a helium atom

Accepted Answer

A) attracts a pair of orbiting electrons. 
B) repels orbiting electrons. 
C) both of these 
D) neither of these 
A) attracts a pair of orbiting electrons. 
B) repels orbiting electrons. 
C) both of these 
D) neither of these

Question 10

Compared to the amount of current that flows from a battery and into a circuit,the amount of current that returns to the battery is

Accepted Answer

A) less. 
B) the same. 
C) greater. 
D) dependent on the internal resistance of the battery. 
A) less. 
B) the same. 
C) greater. 
D) dependent on the internal resistance of the battery.

Question 11

Electrical resistance is greater for

Accepted Answer

A) dry skin. 
B) wet skin. 
C) both the same 
A) dry skin. 
B) wet skin. 
C) both the same

Question 12

In a common dc circuit,electrons typically move at the speed of

Accepted Answer

A) a fraction of a centimeter per second. 
B) a few meters per second. 
C) sound. 
D) light. 
E) none of the above 
A) a fraction of a centimeter per second. 
B) a few meters per second. 
C) sound. 
D) light. 
E) none of the above

Question 13

What is the power rating of a device that draws 0.8 A when connected to 120 V?

Accepted Answer

A) 12 W 
B) 15 W 
C) 60 W 
D) 96 W 
E) 120 W 
A) 12 W 
B) 15 W 
C) 60 W 
D) 96 W 
E) 120 W

Question 14

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 15

An electron is pushed into an electric field where it acquires a 1-V electrical potential.If two electrons are pushed the same distance into the same electric field,the electrical potential of the two electrons is

Accepted Answer

A) 0.25 V. 
B) 0.5 V. 
C) 1 V. 
D) 2 V. 
E) 4 V. 
A) 0.25 V. 
B) 0.5 V. 
C) 1 V. 
D) 2 V. 
E) 4 V.

Question 16

A positive ion has a deficiency of

Accepted Answer

A) electrons. 
B) neutrons. 
C) negative ions. 
A) electrons. 
B) neutrons. 
C) negative ions.

Question 17

The flow of electrons in an electric circuit move by

Accepted Answer

A) bumping other electrons. 
B) colliding with molecules. 
C) interacting with an established electric field. 
D) none of the above 
A) bumping other electrons. 
B) colliding with molecules. 
C) interacting with an established electric field. 
D) none of the above

Question 18

Electric field lines about a point charge extend

Accepted Answer

A) outward when the charge is negative. 
B) outward when the charge is positive. 
C) in circles. 
A) outward when the charge is negative. 
B) outward when the charge is positive. 
C) in circles.

Question 19

The vast numbers of electrons in a coin don't fly off the surface because

Accepted Answer

A) mutual repulsion is incomplete. 
B) they are attracted by an equal number of protons. 
C) they are strongly bonded to their atoms. 
D) all of the above 
E) none of the above 
A) mutual repulsion is incomplete. 
B) they are attracted by an equal number of protons. 
C) they are strongly bonded to their atoms. 
D) all of the above 
E) none of the above

Question 20

Which of these has the greatest mass?

Accepted Answer

A) proton 
B) electron 
C) both of these 
D) neither of these 
A) proton 
B) electron 
C) both of these 
D) neither of these

Exam 8: Static and Current Electricity

Two lamps,a thick-filament one and a thin-filament one,are connected in parallel to a battery.The current is greater in the lamp with the

Current that is typically 60 hertz is

The electric field between oppositely-charged parallel plates is

Two charged particles repel each other with a force F.If the charge of one particle is doubled and the distance between them is doubled,the force will be

Which of these,all of the same length,has the greater electrical resistance?

Which of these does not have an electrical charge?

Which will do more damage,plugging a 120-V hair dryer into a 240-V circuit or plugging a 220-V hair dryer into a 120-V circuit? Explain.

The electric field lines between a pair of equal and opposite charges are

The pair of protons in the nucleus of a helium atom

Compared to the amount of current that flows from a battery and into a circuit,the amount of current that returns to the battery is

Electrical resistance is greater for

In a common dc circuit,electrons typically move at the speed of

What is the power rating of a device that draws 0.8 A when connected to 120 V?

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

An electron is pushed into an electric field where it acquires a 1-V electrical potential.If two electrons are pushed the same distance into the same electric field,the electrical potential of the two electrons is

A positive ion has a deficiency of

The flow of electrons in an electric circuit move by

Electric field lines about a point charge extend

The vast numbers of electrons in a coin don't fly off the surface because

Which of these has the greatest mass?

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 Time - Reading 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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