Question 1

If you do 10 J of work to push 1 coulomb of charge into an electric field,its voltage with respect to its starting position is

Accepted Answer

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

Question 2

Strictly speaking,it is correct to say that voltage

Accepted Answer

A) flows through a circuit. 
B) flows across a circuit. 
C) is impressed across a device in a circuit. 
D) all of these 
A) flows through a circuit. 
B) flows across a circuit. 
C) is impressed across a device in a circuit. 
D) all of these

Question 3

Three resistors take the shape of a triangle,one resistor in each leg.Resistance in one leg is 4 ohms,in a second leg is 6 ohms,and third leg is 10 ohms.A measurement of resistance across the 10-ohm resistor will show the equivalent resistance to be

Accepted Answer

A) 1.4 ohms. 
B) 5 ohms. 
C) 6.7 ohms. 
D) greater than 6.7 ohms. 
A) 1.4 ohms. 
B) 5 ohms. 
C) 6.7 ohms. 
D) greater than 6.7 ohms.

Question 4

An electric heater is rated at 300 W when used in a 110-V circuit.The safety fuse in the circuit can accommodate 15 A of current.How many heaters can be safely operated in the circuit?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) more than 5 
A) 2 
B) 3 
C) 4 
D) 5 
E) more than 5

Question 5

Strictly speaking,it is correct to say that

Accepted Answer

A) charge flows through a circuit. 
B) voltage flows through a circuit. 
C) resistance is established across a circuit. 
D) current causes voltage. 
E) all of these 
A) charge flows through a circuit. 
B) voltage flows through a circuit. 
C) resistance is established across a circuit. 
D) current causes voltage. 
E) all of these

Question 6

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

Accepted Answer

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

Question 7

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 8

When a steady voltage is across one-half as much resistance,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 9

The average speed of electrons flowing though the filament of a dc flashlight bulb is

Accepted Answer

A) about the same speed as sound in metals. 
B) dependent on how quickly electrons bumps into one another. 
C) the speed of light. 
D) 1000 cm/s. 
E) a snail's pace of less than 1 cm/s. 
A) about the same speed as sound in metals. 
B) dependent on how quickly electrons bumps into one another. 
C) the speed of light. 
D) 1000 cm/s. 
E) a snail's pace of less than 1 cm/s.

Question 10

Compared to the resistance of two resistors connected in series,the same two resistors connected in parallel have

Accepted Answer

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

Question 11

Electric charge distributes itself on conducting surfaces

Accepted Answer

A) with greater concentration on flat parts. 
B) such that the electric field inside is zero. 
C) both of the above 
D) none of the above 
A) with greater concentration on flat parts. 
B) such that the electric field inside is zero. 
C) both of the above 
D) none of the above

Question 12

The damage of electrical shock is predominantly due to

Accepted Answer

A) excess current. 
B) an absence of voltage. 
C) reduced resistance. 
D) none of the above 
A) excess current. 
B) an absence of voltage. 
C) reduced resistance. 
D) none of the above

Question 13

Alternating current is normally produced by a

Accepted Answer

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

Question 14

Current in a conductor can be increased by

Accepted Answer

A) increasing the voltage across it. 
B) reducing its resistance. 
C) both of these 
D) neither of these 
A) increasing the voltage across it. 
B) reducing its resistance. 
C) both of these 
D) neither of these

Question 15

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

Accepted Answer

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

Question 16

Compared to the mass of a proton,the mass of an electron is

Accepted Answer

A) very much less. 
B) identical. 
C) greater. 
A) very much less. 
B) identical. 
C) greater.

Question 17

The unit of electric charge,the coulomb,is the charge on

Accepted Answer

A) one electron. 
B) one proton. 
C) a specific large number of electrons. 
A) one electron. 
B) one proton. 
C) a specific large number of electrons.

Question 18

Voltage is most similar to

Accepted Answer

A) pressure. 
B) current. 
C) resistance. 
D) all of the above 
E) none of the above 
A) pressure. 
B) current. 
C) resistance. 
D) all of the above 
E) none of the above

Question 19

Just as a sustained flow of water in a hydraulic circuit needs a pump,the flow of charge in an electric circuit needs

Accepted Answer

A) current. 
B) voltage. 
C) resistance. 
A) current. 
B) voltage. 
C) resistance.

Question 20

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.

Exam 8: Static and Current Electricity

If you do 10 J of work to push 1 coulomb of charge into an electric field,its voltage with respect to its starting position is

Strictly speaking,it is correct to say that voltage

Three resistors take the shape of a triangle,one resistor in each leg.Resistance in one leg is 4 ohms,in a second leg is 6 ohms,and third leg is 10 ohms.A measurement of resistance across the 10-ohm resistor will show the equivalent resistance to be

An electric heater is rated at 300 W when used in a 110-V circuit.The safety fuse in the circuit can accommodate 15 A of current.How many heaters can be safely operated in the circuit?

Strictly speaking,it is correct to say that

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

Electric charge will flow in an electric circuit when

When a steady voltage is across one-half as much resistance,the current

The average speed of electrons flowing though the filament of a dc flashlight bulb is

Compared to the resistance of two resistors connected in series,the same two resistors connected in parallel have

Electric charge distributes itself on conducting surfaces

The damage of electrical shock is predominantly due to

Alternating current is normally produced by a

Current in a conductor can be increased by

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

Compared to the mass of a proton,the mass of an electron is

The unit of electric charge,the coulomb,is the charge on

Voltage is most similar to

Just as a sustained flow of water in a hydraulic circuit needs a pump,the flow of charge in an electric circuit needs

The source of electrons lighting an incandescent ac light bulb is

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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