Question 1

The number of protons in the nucleus of an electrically neutral atom is equal to the number of

Accepted Answer

A) electrons that surround the nucleus. 
B) neutrons in the nucleus. 
C) both 
D) neither 
A) electrons that surround the nucleus. 
B) neutrons in the nucleus. 
C) both 
D) neither

Question 2

Stretch a copper wire so that it is thinner and the resistance between its ends

Accepted Answer

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

Question 3

A 60-W bulb and a 100-W bulb are connected in series in a circuit. Which draws more current? Which draws more current when connected in parallel?

Accepted Answer

Both bulbs connected in series have the

Question 4

A positive and a negative charge near each other are released. As they move, the force on each particle

Accepted Answer

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

Question 5

Normally a balloon charged to several thousand volts has a relatively small amount of

Accepted Answer

A) charge. 
B) energy. 
C) both 
D) neither 
A) charge. 
B) energy. 
C) both 
D) neither

Question 6

If you do 10 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, its kinetic energy is

Accepted Answer

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

Question 7

A charged balloon illustrates that something can have a great amount of

Accepted Answer

A) potential energy and a low voltage. 
B) voltage and a small potential energy. 
C) both voltage and potential energy. 
D) none of the above 
A) potential energy and a low voltage. 
B) voltage and a small potential energy. 
C) both voltage and potential energy. 
D) none of the above

Question 8

Connect a pair of lamps in series and you draw current from the connecting battery. Connect the same lamps in parallel and you draw

Accepted Answer

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

Question 9

In an electric circuit, the safety fuse is connected to the circuit in

Accepted Answer

A) series. 
B) parallel. 
C) such a way to reduce danger. 
A) series. 
B) parallel. 
C) such a way to reduce danger.

Question 10

The electric field in the wires of an ac circuit

Accepted Answer

A) changes via the inverse square law. 
B) changes direction with time. 
C) remains relatively constant. 
D) is nonexistent. 
E) none of the above 
A) changes via the inverse square law. 
B) changes direction with time. 
C) remains relatively constant. 
D) is nonexistent. 
E) none of the above

Question 11

To say that an object is electrically polarized is to say

Accepted Answer

A) it is electrically charged. 
B) its charges have been rearranged. 
C) its internal electric field is zero. 
D) it is only partially conducting. 
E) it is to some degree magnetic. 
A) it is electrically charged. 
B) its charges have been rearranged. 
C) its internal electric field is zero. 
D) it is only partially conducting. 
E) it is to some degree magnetic.

Question 12

A certain bulb with a resistance of 95 ohms and labeled "150 W" is designated for use in a

Accepted Answer

A) 120-V circuit. 
B) 240-V circuit. 
C) either 
D) not enough information 
A) 120-V circuit. 
B) 240-V circuit. 
C) either 
D) not enough information

Question 13

When two lamps are connected in parallel 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 14

The current in a 100-W bulb connected to a 120-V source is

Accepted Answer

A) 0.5 A. 
B) 1.2 A. 
C) 12,000 A. 
D) none of the above 
A) 0.5 A. 
B) 1.2 A. 
C) 12,000 A. 
D) none of the above

Question 15

Two charges separated by 1 m exert a 1.0-N force on each other. If the charges are pushed to 0.25-m separation, the force on each charge will be

Accepted Answer

A) 1 N. 
B) 2 N. 
C) 4 N. 
D) 8 N. 
E) 16 N. 
A) 1 N. 
B) 2 N. 
C) 4 N. 
D) 8 N. 
E) 16 N.

Question 16

Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will draw

Accepted Answer

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

Question 17

The flow of charge in a circuit depends on

Accepted Answer

A) adequate resistance. 
B) a potential difference. 
C) adequate chemical action. 
D) all of the above 
A) adequate resistance. 
B) a potential difference. 
C) adequate chemical action. 
D) all of the above

Question 18

Electric charge will flow in an electric circuit when

Accepted Answer

A) electric resistance is low. 
B) a potential difference exists. 
C) the circuit is grounded. 
D) electric devices in the circuit are not defective. 
A) electric resistance is low. 
B) a potential difference exists. 
C) the circuit is grounded. 
D) electric devices in the circuit are not defective.

Question 19

As you comb your hair, electrons are rubbed onto the comb, which becomes

Accepted Answer

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

Question 20

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

Accepted Answer

Similarities: Both laws are inverse-squa

Exam 8: Static and Current Electricity

The number of protons in the nucleus of an electrically neutral atom is equal to the number of

Stretch a copper wire so that it is thinner and the resistance between its ends

A 60-W bulb and a 100-W bulb are connected in series in a circuit. Which draws more current? Which draws more current when connected in parallel?

A positive and a negative charge near each other are released. As they move, the force on each particle

Normally a balloon charged to several thousand volts has a relatively small amount of

If you do 10 J of work to push a charge into an electric field and then release the charge, as it flies past its starting position, its kinetic energy is

A charged balloon illustrates that something can have a great amount of

Connect a pair of lamps in series and you draw current from the connecting battery. Connect the same lamps in parallel and you draw

In an electric circuit, the safety fuse is connected to the circuit in

The electric field in the wires of an ac circuit

To say that an object is electrically polarized is to say

A certain bulb with a resistance of 95 ohms and labeled "150 W" is designated for use in a

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

The current in a 100-W bulb connected to a 120-V source is

Two charges separated by 1 m exert a 1.0-N force on each other. If the charges are pushed to 0.25-m separation, the force on each charge will be

Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will draw

The flow of charge in a circuit depends on

Electric charge will flow in an electric circuit when

As you comb your hair, electrons are rubbed onto the comb, which becomes

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

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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