Question 1

The number of electrons delivered daily by power utilities to an average American home during a typical week is

Accepted Answer

A) zero. 
B) 110. 
C) 220. 
D) billions of billions. 
E) none of the above 
A) zero. 
B) 110. 
C) 220. 
D) billions of billions. 
E) none of the above

Question 2

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 3

If you plug a 110-V electric toaster into a 220-V outlet,current in the toaster will be about

Accepted Answer

A) half what is should be. 
B) the same as if it were plugged into a 110-V outlet. 
C) more than twice what it should be. 
D) twice what it should be. 
A) half what is should be. 
B) the same as if it were plugged into a 110-V outlet. 
C) more than twice what it should be. 
D) twice what it should be.

Question 4

Charge carriers in a metal are electrons rather than protons because electrons are

Accepted Answer

A) negative. 
B) smaller. 
C) loosely bound. 
D) all of the above 
E) none of the above 
A) negative. 
B) smaller. 
C) loosely bound. 
D) all of the above 
E) none of the above

Question 5

As more lamps are put into a series circuit,the overall current in the power source

Accepted Answer

A) increases. 
B) decreases. 
C) stays the same. 
A) increases. 
B) decreases. 
C) stays the same.

Question 6

The equivalent resistance of any parallel branch 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 7

Just as water flows from high to low pressure,electric charge flows from

Accepted Answer

A) high to low voltage. 
B) high charge concentration to low charge concentration. 
C) high resistance to low resistance. 
D) all of the above 
E) none of the above 
A) high to low voltage. 
B) high charge concentration to low charge concentration. 
C) high resistance to low resistance. 
D) all of the above 
E) none of the above

Question 8

The source of electrons in an ordinary electric circuit is

Accepted Answer

A) a dry cell,wet cell,or battery. 
B) usually a wall socket. 
C) a generator at the power station. 
D) the electric conductor itself. 
E) none of the above 
A) a dry cell,wet cell,or battery. 
B) usually a wall socket. 
C) a generator at the power station. 
D) the electric conductor itself. 
E) none of the above

Question 9

The amount of energy given to each coulomb of charge flowing through a 12-V battery is

Accepted Answer

A) 12 J. 
B) 12 A. 
C) 12 V. 
D) all of the above 
E) none of the above 
A) 12 J. 
B) 12 A. 
C) 12 V. 
D) all of the above 
E) none of the above

Question 10

Heat a copper wire and its electrical resistance

Accepted Answer

A) decreases. 
B) remains unchanged. 
C) increases. 
A) decreases. 
B) remains unchanged. 
C) increases.

Question 11

Much of the charge on a conducting cube is

Accepted Answer

A) uniformly spread over its surface. 
B) partly beneath the surface. 
C) mutually repelled toward its corners. 
D) none of the above 
A) uniformly spread over its surface. 
B) partly beneath the surface. 
C) mutually repelled toward its corners. 
D) none of the above

Question 12

A pair of 1-ohm resistors connected in parallel has a combined resistance of

Accepted Answer

A) 1 ohm. 
B) 2 ohms. 
C) 1/2 ohm. 
D) none of the above 
A) 1 ohm. 
B) 2 ohms. 
C) 1/2 ohm. 
D) none of the above

Question 13

A pair of 1-ohm resistors connected in series is 2 ohms,and when connected in parallel is

Accepted Answer

A) 1/2 ohm. 
B) 1 ohm. 
C) also 2 ohms. 
D) none of the above 
A) 1/2 ohm. 
B) 1 ohm. 
C) also 2 ohms. 
D) none of the above

Question 14

Which has the larger resistance,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 15

What are the similarities and differences between Coulomb's law and Newton's law of gravitation?

Accepted Answer

Similarities: Both laws are inverse-squa

Question 16

More toll booths on a highway is analogous to a

Accepted Answer

A) series circuit. 
B) parallel circuit. 
C) complex combination of both of these 
A) series circuit. 
B) parallel circuit. 
C) complex combination of both of these

Question 17

An electrically polarized object normally has

Accepted Answer

A) a net charge of zero. 
B) displaced charges. 
C) both of these 
D) none of the above 
A) a net charge of zero. 
B) displaced charges. 
C) both of these 
D) none of the above

Question 18

Which has the thicker lamp filament,a 60-W incandescent bulb or a 100-W incandescent bulb?

Accepted Answer

The 100-W bulb has less resistance and a

Question 19

What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply?

Accepted Answer

A) 1 ohm 
B) 60 ohms 
C) 100 ohms 
D) 144 ohms 
E) none of the above 
A) 1 ohm 
B) 60 ohms 
C) 100 ohms 
D) 144 ohms 
E) none of the above

Question 20

The electric force between charges depends on the

Accepted Answer

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

Exam 8: Static and Current Electricity

The number of electrons delivered daily by power utilities to an average American home during a typical week is

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

If you plug a 110-V electric toaster into a 220-V outlet,current in the toaster will be about

Charge carriers in a metal are electrons rather than protons because electrons are

As more lamps are put into a series circuit,the overall current in the power source

The equivalent resistance of any parallel branch in a circuit is

Just as water flows from high to low pressure,electric charge flows from

The source of electrons in an ordinary electric circuit is

The amount of energy given to each coulomb of charge flowing through a 12-V battery is

Heat a copper wire and its electrical resistance

Much of the charge on a conducting cube is

A pair of 1-ohm resistors connected in parallel has a combined resistance of

A pair of 1-ohm resistors connected in series is 2 ohms,and when connected in parallel is

Which has the larger resistance,a 60-W or a 100-W incandescent lamp,both rated for 120-V operation?

What are the similarities and differences between Coulomb's law and Newton's law of gravitation?

More toll booths on a highway is analogous to a

An electrically polarized object normally has

Which has the thicker lamp filament,a 60-W incandescent bulb or a 100-W incandescent bulb?

What is the resistance of a 120-W incandescent lamp connected to a 120-V power supply?

The electric force between charges depends on 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

Filters