Question 1

The electric charge of all electrons

Accepted Answer

A) vary from atom to atom. 
B) vary from ion to ion. 
C) are identical. 
A) vary from atom to atom. 
B) vary from ion to ion. 
C) are identical.

Question 2

It takes 10 J of work to push a charge into an electric field.Relative to its starting position it has gained a potential energy of

Accepted Answer

A) less than 10 J. 
B) 10 J. 
C) more than 10 J. 
D) none of the above 
A) less than 10 J. 
B) 10 J. 
C) more than 10 J. 
D) none of the above

Question 3

More current will occur in a lamp when its filament is

Accepted Answer

A) cold. 
B) hot. 
C) either cold or hot. 
A) cold. 
B) hot. 
C) either cold or hot.

Question 4

Two charged particles near each other are released.As the particles move,the velocity of each increases.Therefore,the particles have

Accepted Answer

A) the same sign. 
B) the opposite sign. 
C) not enough information 
A) the same sign. 
B) the opposite sign. 
C) not enough information

Question 5

When a battery does 24 J of work on 10 C of charge,the voltage it supplies is

Accepted Answer

A) 2.4 V. 
B) 4.2 V. 
C) 24 V. 
D) 240 V. 
E) none of the above 
A) 2.4 V. 
B) 4.2 V. 
C) 24 V. 
D) 240 V. 
E) none of the above

Question 6

A sustained electric current can be achieved with a

Accepted Answer

A) generator. 
B) battery. 
C) both 
D) none of the above 
A) generator. 
B) battery. 
C) both 
D) none of the above

Question 7

A length of wire has resistance R.The same kind of wire twice as long has 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 8

The equivalent resistance of resistors connected in series in a circuit is

Accepted Answer

A) often less than the resistance of the lowest resistor. 
B) always less than the resistance of the lowest resistor. 
C) usually half the value of the lowest resistor. 
D) none of the above 
A) often less than the resistance of the lowest resistor. 
B) always less than the resistance of the lowest resistor. 
C) usually half the value of the lowest resistor. 
D) none of the above

Question 9

A suitable electric pump in an electric circuit is a

Accepted Answer

A) chemical battery. 
B) generator. 
C) both of these 
D) neither of these 
A) chemical battery. 
B) generator. 
C) both of these 
D) neither of these

Question 10

The electric current in a copper wire is normally composed of

Accepted Answer

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

Question 11

For electric power that costs 10 cents per kilowatt hour,the cost of operating a 110-V heater that uses 20 A for 10 hours is

Accepted Answer

A) $0.22. 
B) $0.55. 
C) $2.20. 
D) $5.50. 
E) none of the above 
A) $0.22. 
B) $0.55. 
C) $2.20. 
D) $5.50. 
E) none of the above

Question 12

The fundamental force underlying all chemical reactions is

Accepted Answer

A) gravitational. 
B) nuclear. 
C) centripetal. 
D) electrical. 
E) none of the above 
A) gravitational. 
B) nuclear. 
C) centripetal. 
D) electrical. 
E) none of the above

Question 13

What is electric resistance? What characteristics of a wire determine its resistance? How does resistance normally vary with temperature?

Accepted Answer

Electric resistance is the opposition a

Question 14

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

Accepted Answer

A) attract. 
B) repel or attract. 
C) obey the inverse-square law. 
D) act over shorter distances. 
E) are weaker. 
A) attract. 
B) repel or attract. 
C) obey the inverse-square law. 
D) act over shorter distances. 
E) are weaker.

Question 15

Which draws more current,a 60-W or a 100-W incandescent lamp,both rated for 120-V operation?

Accepted Answer

A) 60-W lamp 
B) 100-W lamp 
C) both the same 
A) 60-W lamp 
B) 100-W lamp 
C) both the same

Question 16

The value of a resistor that carries 2 A when connected to 10 V is

Accepted Answer

A) 2 ohms. 
B) 5 ohms. 
C) 10 ohms. 
D) 20 ohms. 
E) more than 20 ohms. 
A) 2 ohms. 
B) 5 ohms. 
C) 10 ohms. 
D) 20 ohms. 
E) more than 20 ohms.

Question 17

Two charged particles 1 m apart exert a 1-N force on each other.If the particles are instead 0.5 m apart,the force on each particle will be

Accepted Answer

A) 1.0 N. 
B) 2.0 N. 
C) 4.0 N. 
D) 8.0 N. 
E) 16.0 N. 
A) 1.0 N. 
B) 2.0 N. 
C) 4.0 N. 
D) 8.0 N. 
E) 16.0 N.

Question 18

Two light bulbs,a thick-filament one and a thin-filament one,are connected in parallel to a battery.The voltage is greater across the lamp with the

Accepted Answer

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

Exam 8: Static and Current Electricity

The electric charge of all electrons

It takes 10 J of work to push a charge into an electric field.Relative to its starting position it has gained a potential energy of

More current will occur in a lamp when its filament is

Two charged particles near each other are released.As the particles move,the velocity of each increases.Therefore,the particles have

When a battery does 24 J of work on 10 C of charge,the voltage it supplies is

A sustained electric current can be achieved with a

A length of wire has resistance R.The same kind of wire twice as long has resistance

The equivalent resistance of resistors connected in series in a circuit is

A suitable electric pump in an electric circuit is a

The electric current in a copper wire is normally composed of

For electric power that costs 10 cents per kilowatt hour,the cost of operating a 110-V heater that uses 20 A for 10 hours is

The fundamental force underlying all chemical reactions is

What is electric resistance? What characteristics of a wire determine its resistance? How does resistance normally vary with temperature?

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

Which draws more current,a 60-W or a 100-W incandescent lamp,both rated for 120-V operation?

The value of a resistor that carries 2 A when connected to 10 V is

Two charged particles 1 m apart exert a 1-N force on each other.If the particles are instead 0.5 m apart,the force on each particle will be

Two light bulbs,a thick-filament one and a thin-filament one,are connected in parallel to a battery.The voltage is greater across the lamp with the

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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