Question 1

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 2

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 3

The purpose of the third prong on a common electric plug for an appliance is to

Accepted Answer

A) handle three-phase electricity. 
B) provide an alternate live wire. 
C) connect the appliance to zero ground potential. 
D) substitute for a safety fuse. 
E) all of these. 
A) handle three-phase electricity. 
B) provide an alternate live wire. 
C) connect the appliance to zero ground potential. 
D) substitute for a safety fuse. 
E) all of these.

Question 4

The direction of an electric field is defined as the direction of force on a

Accepted Answer

A) charged particle. 
B) a positively-charged particle. 
C) a negatively-charged particle. 
A) charged particle. 
B) a positively-charged particle. 
C) a negatively-charged particle.

Question 5

What is an electric current? How does it move in a wire? How fast do the electrons move?

Accepted Answer

Electric current is the flow of electric

Question 6

The electric resistance of a superconductor is

Accepted Answer

A) zero. 
B) infinite. 
C) usually lower than that of ordinary resistors. 
A) zero. 
B) infinite. 
C) usually lower than that of ordinary resistors.

Question 7

The electric power of a lamp that carries 2 A at 120 V is

Accepted Answer

A) 1/6 W. 
B) 2 W. 
C) 60 W. 
D) 20 W. 
E) 240 W. 
A) 1/6 W. 
B) 2 W. 
C) 60 W. 
D) 20 W. 
E) 240 W.

Question 8

Two charges separated by 1 m exert a 1-N force on each other. If the magnitude of each charge is doubled, the force on each charge will be

Accepted Answer

A) 1 N. 
B) 2 N. 
C) 4 N. 
D) 8 N. 
E) none of the above 
A) 1 N. 
B) 2 N. 
C) 4 N. 
D) 8 N. 
E) none of the above

Question 9

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 10

Two charged particles near each other are released. As they move, the force on each particle 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 11

Food cooked in a microwave oven depends on electrical

Accepted Answer

A) conduction. 
B) charge polarization. 
C) resistance changes. 
D) field strength. 
E) all of the above 
A) conduction. 
B) charge polarization. 
C) resistance changes. 
D) field strength. 
E) all of the above

Question 12

When a person experiences an electric shock, the origin of the electrons comprising the shock is

Accepted Answer

A) the person's own body. 
B) the ground. 
C) a power plant. 
D) likely a faulty lamp. 
E) the electric field in the air. 
A) the person's own body. 
B) the ground. 
C) a power plant. 
D) likely a faulty lamp. 
E) the electric field in the air.

Question 13

The nucleus of an atom is charged

Accepted Answer

A) positively. 
B) negatively. 
C) both 
D) none of the above 
A) positively. 
B) negatively. 
C) both 
D) none of the above

Question 14

When the voltage across a steady resistance is doubled, the current

Accepted Answer

A) is half. 
B) remains the same. 
C) is doubled. 
D) is quadrupled. 
A) is half. 
B) remains the same. 
C) is doubled. 
D) is quadrupled.

Question 15

When you scuff electrons from a carpet onto your feet, you become

Accepted Answer

A) negatively charged. 
B) positively charged. 
C) polarized. 
D) ionized. 
E) neutralized. 
A) negatively charged. 
B) positively charged. 
C) polarized. 
D) ionized. 
E) neutralized.

Question 16

The electric charge on 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 17

If you strip electrons from an atom, the atom becomes a

Accepted Answer

A) positive ion. 
B) negative ion. 
C) different element. 
A) positive ion. 
B) negative ion. 
C) different element.

Question 18

The source of electrons lighting an incandescent ac light bulb is

Accepted Answer

A) the power company. 
B) the electric outlet. 
C) atoms in the light bulb filament. 
D) the wire leading to the lamp. 
E) the source voltage. 
A) the power company. 
B) the electric outlet. 
C) atoms in the light bulb filament. 
D) the wire leading to the lamp. 
E) the source voltage.

Question 19

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 20

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

Exam 8: Static and Current Electricity

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

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 purpose of the third prong on a common electric plug for an appliance is to

The direction of an electric field is defined as the direction of force on a

What is an electric current? How does it move in a wire? How fast do the electrons move?

The electric resistance of a superconductor is

The electric power of a lamp that carries 2 A at 120 V is

Two charges separated by 1 m exert a 1-N force on each other. If the magnitude of each charge is doubled, the force on each charge will be

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

Two charged particles near each other are released. As they move, the force on each particle increases. Therefore, the particles have

Food cooked in a microwave oven depends on electrical

When a person experiences an electric shock, the origin of the electrons comprising the shock is

The nucleus of an atom is charged

When the voltage across a steady resistance is doubled, the current

When you scuff electrons from a carpet onto your feet, you become

The electric charge on all electrons

If you strip electrons from an atom, the atom becomes a

The source of electrons lighting an incandescent ac light bulb is

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

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

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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