Question 1

A 100-W lamp glows brighter than a 25-W lamp.The electric resistance of the 100-W lamp is

Accepted Answer

A) less. 
B) greater. 
C) the same. 
A) less. 
B) greater. 
C) the same.

Question 2

A 4-ohm and 6-ohm resistor connected in parallel have an equivalent resistance of

Accepted Answer

A) 2.4 ohms. 
B) 4 ohms. 
C) 5 ohms. 
D) 5.5 ohms. 
E) 10 ohms. 
A) 2.4 ohms. 
B) 4 ohms. 
C) 5 ohms. 
D) 5.5 ohms. 
E) 10 ohms.

Question 3

The current through two identical light bulbs connected in series is 0.25 A.The voltage across both bulbs is 110 V.The resistance of a single light bulb is

Accepted Answer

A) 22 ohms. 
B) 44 ohms. 
C) 220 ohms. 
D) 440 ohms. 
E) none of the above 
A) 22 ohms. 
B) 44 ohms. 
C) 220 ohms. 
D) 440 ohms. 
E) none of the above

Question 4

A compact fluorescent lamp gives more light output for

Accepted Answer

A) less power. 
B) the same power. 
C) greater resistance. 
A) less power. 
B) the same power. 
C) greater resistance.

Question 5

Electric potential is the ratio of electric energy to the amount of electric

Accepted Answer

A) current. 
B) resistance. 
C) charge. 
D) voltage. 
E) none of the above 
A) current. 
B) resistance. 
C) charge. 
D) voltage. 
E) none of the above

Question 6

Electric potential is measured in units of

Accepted Answer

A) volts. 
B) joules. 
C) amperes. 
D) watts. 
E) any or all of these 
A) volts. 
B) joules. 
C) amperes. 
D) watts. 
E) any or all of these

Question 7

Two charged particles 1 m apart exert a 1-N force on each other.If the magnitude of each charge is doubled,the force on each particle 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 8

When you scuff electrons from a carpet onto your shoes,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 9

Two charged particles 1 m apart exert a 1-N force on each other.If the particles are instead 0.25-m apart,the force on each particle will be

Accepted Answer

A) 1.0 N. 
B) 2.0 N. 
C) 4.0 N. 
D) 8.0 N. 
E) 16.0 N. 
A) 1.0 N. 
B) 2.0 N. 
C) 4.0 N. 
D) 8.0 N. 
E) 16.0 N.

Question 10

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

Accepted Answer

A) charge. 
B) energy. 
C) both of these 
D) none of the above 
A) charge. 
B) energy. 
C) both of these 
D) none of the above

Question 11

A negatively-charged balloon touching a wooden wall

Accepted Answer

A) pulls positive charge on the wall surface toward it. 
B) pushes negative charge in the wall away from it. 
C) polarizes molecules in the wall. 
D) all of the above 
E) none of the above 
A) pulls positive charge on the wall surface toward it. 
B) pushes negative charge in the wall away from it. 
C) polarizes molecules in the wall. 
D) all of the above 
E) none of the above

Question 12

Which of these,both of the same length,has the greater electrical resistance?

Accepted Answer

A) a thick copper wire 
B) a thin copper wire 
C) both about the same 
D) need more information 
A) a thick copper wire 
B) a thin copper wire 
C) both about the same 
D) need more information

Question 13

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 14

The amount of current in an incandescent bulb rated 75W-120V is about

Accepted Answer

A) 0.4 A. 
B) 0.6 A. 
C) 1.2 A. 
D) more than 1.2 A. 
A) 0.4 A. 
B) 0.6 A. 
C) 1.2 A. 
D) more than 1.2 A.

Question 15

A negatively charged rod is brought near a metal can that rests on a wooden table.You touch the opposite side of the can momentarily with your finger.The can then becomes

Accepted Answer

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

Question 16

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 17

The electric force between charges is strongest when the charges are

Accepted Answer

A) close together. 
B) far apart. 
C) either of these 
A) close together. 
B) far apart. 
C) either of these

Question 18

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 19

The purpose of a voltage source is to provide an electrical

Accepted Answer

A) energy sink. 
B) field. 
C) pressure. 
A) energy sink. 
B) field. 
C) pressure.

Question 20

In a circuit powered by a battery it is correct to say that electrons flow

Accepted Answer

A) from the battery and into the circuit. 
B) from the negative terminal to the positive terminal of the battery. 
C) through both the battery and the devices making up the circuit. 
D) none of the above 
A) from the battery and into the circuit. 
B) from the negative terminal to the positive terminal of the battery. 
C) through both the battery and the devices making up the circuit. 
D) none of the above

Exam 8: Static and Current Electricity

A 100-W lamp glows brighter than a 25-W lamp.The electric resistance of the 100-W lamp is

A 4-ohm and 6-ohm resistor connected in parallel have an equivalent resistance of

The current through two identical light bulbs connected in series is 0.25 A.The voltage across both bulbs is 110 V.The resistance of a single light bulb is

A compact fluorescent lamp gives more light output for

Electric potential is the ratio of electric energy to the amount of electric

Electric potential is measured in units of

Two charged particles 1 m apart exert a 1-N force on each other.If the magnitude of each charge is doubled,the force on each particle will be

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

Two charged particles 1 m apart exert a 1-N force on each other.If the particles are instead 0.25-m apart,the force on each particle will be

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

A negatively-charged balloon touching a wooden wall

Which of these,both of the same length,has the greater electrical resistance?

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

The amount of current in an incandescent bulb rated 75W-120V is about

A negatively charged rod is brought near a metal can that rests on a wooden table.You touch the opposite side of the can momentarily with your finger.The can then becomes

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

The electric force between charges is strongest when the charges are

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

The purpose of a voltage source is to provide an electrical

In a circuit powered by a battery it is correct to say that electrons flow

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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