Question 1

The pair of protons in the nucleus of a helium atom

Accepted Answer

A) attract a pair of orbiting electrons. 
B) repel orbiting electrons. 
C) both of these 
D) neither of these 
A) attract a pair of orbiting electrons. 
B) repel orbiting electrons. 
C) both of these 
D) neither of these

Question 2

A semiconductor can be

Accepted Answer

A) a conductor. 
B) an insulator. 
C) both of these 
D) neither of these 
A) a conductor. 
B) an insulator. 
C) both of these 
D) neither of these

Question 3

A fundamental rule of electricity is that

Accepted Answer

A) like kinds of charges repel. 
B) unlike kinds of charges attract. 
C) both of these 
D) neither of these 
A) like kinds of charges repel. 
B) unlike kinds of charges attract. 
C) both of these 
D) neither of these

Question 4

An uncharged pith ball is suspended by a nylon fiber. When a positively-charged rubber rod is brought nearby, the pith ball

Accepted Answer

A) moves toward the rod. 
B) is unaffected. 
C) moves away from the rod. 
D) none of the above 
A) moves toward the rod. 
B) is unaffected. 
C) moves away from the rod. 
D) none of the above

Question 5

Assume that 10 J of work pushes a charge initially at rest into an electric field. If the charge is then released, it flies back to its starting position with a kinetic energy of

Accepted Answer

A) zero. 
B) 5 J. 
C) 10 J. 
D) more than 10 J. 
E) need more information. 
A) zero. 
B) 5 J. 
C) 10 J. 
D) more than 10 J. 
E) need more information.

Question 6

A transistor is an example of a

Accepted Answer

A) resistor. 
B) superconductor. 
C) semiconductor. 
D) dry cell. 
E) transmitter. 
A) resistor. 
B) superconductor. 
C) semiconductor. 
D) dry cell. 
E) transmitter.

Question 7

The electrical force between electric charges depends only on their

Accepted Answer

A) magnitude. 
B) separation distance. 
C) both of these 
D) neither of these 
A) magnitude. 
B) separation distance. 
C) both of these 
D) neither of these

Question 8

A reason for electric shielding inside a conductor is that any free electrons inside would

Accepted Answer

A) not obey the inverse-square law. 
B) cancel one another. 
C) be set in motion until equilibrium is established, on the outside. 
D) all of the above 
E) none of the above 
A) not obey the inverse-square law. 
B) cancel one another. 
C) be set in motion until equilibrium is established, on the outside. 
D) all of the above 
E) none of the above

Question 9

A main difference between gravitational and electric forces is that electrical 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 10

Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of

Accepted Answer

A) energy transfer. 
B) electric field. 
C) polarization. 
D) conduction. 
A) energy transfer. 
B) electric field. 
C) polarization. 
D) conduction.

Question 11

If electrons are stripped from an atom it becomes a

Accepted Answer

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

Question 12

Superconductors are noted for their

Accepted Answer

A) high electric resistance. 
B) low electric resistance. 
C) absence of electric resistance. 
D) low cost. 
E) bright colors. 
A) high electric resistance. 
B) low electric resistance. 
C) absence of electric resistance. 
D) low cost. 
E) bright colors.

Question 13

If 10 J of work is used in pushing 1 C of charge into an electric field, its electric potential relative to its starting position is

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

Two charges that are separated by one meter exert 1-N forces on each other. If the charges are pushed together so the separation is 25 centimeters, 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

Rub electrons from your hair with a comb and the comb becomes

Accepted Answer

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

Question 17

If you comb your hair and the comb becomes positively charged, then your hair becomes

Accepted Answer

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

Question 18

A common naturally-polarized bit of matter is

Accepted Answer

A) an electron. 
B) a hydrogen atom 
C) a water molecule. 
D) all of the above 
E) none of the above 
A) an electron. 
B) a hydrogen atom 
C) a water molecule. 
D) all of the above 
E) none of the above

Question 19

Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is halved, then 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 20

Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction 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

Exam 22: Electrostatics

The pair of protons in the nucleus of a helium atom

A semiconductor can be

A fundamental rule of electricity is that

An uncharged pith ball is suspended by a nylon fiber. When a positively-charged rubber rod is brought nearby, the pith ball

Assume that 10 J of work pushes a charge initially at rest into an electric field. If the charge is then released, it flies back to its starting position with a kinetic energy of

A transistor is an example of a

The electrical force between electric charges depends only on their

A reason for electric shielding inside a conductor is that any free electrons inside would

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

Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is high, the relatively small amount of charge means a relatively small amount of

If electrons are stripped from an atom it becomes a

Superconductors are noted for their

If 10 J of work is used in pushing 1 C of charge into an electric field, its electric potential relative to its starting position is

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

Two charges that are separated by one meter exert 1-N forces on each other. If the charges are pushed together so the separation is 25 centimeters, the force on each charge will be

Rub electrons from your hair with a comb and the comb becomes

If you comb your hair and the comb becomes positively charged, then your hair becomes

A common naturally-polarized bit of matter is

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

Two charged particles attract each other with a force F. If the charges of both particles are doubled, and the distance between them also doubled, then the force of attraction will be

About Science

Newtons First Law of Motion: Inertia

Linear Motion

Newtons Second Law of Motion

Newtons Third Law of Motion: Action and Reaction

Momentum

Energy

Rotational Motion

Gravity

Projectile and Satellite Motion

Atomic Nature of Matter

Solids

Liquids

Gases and Plasmas

Temperature, Heat, and Expansion

Heat Transfer

Change of Phase

Thermodynamics

Vibrations and Waves

Sound

Musical Sounds

Electric Current

Magnetism

Electromagnetic Induction

Properties of Light

Color

Reflection and Refraction

Light Waves

Light Emission

Light Quanta

The Atom and the Quantum

Atomic Nucleus and Radioactivity

Nuclear Fission and Fusion

Special Theory of Relativity

General Theory of Relativity

Systems of Measurement

Filters