Question 1

The main difference between a generator and a motor involves which terminal is

Accepted Answer

A) input. 
B) output. 
C) both 
A) input. 
B) output. 
C) both

Question 2

Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a

Accepted Answer

A) north pole. 
B) south pole. 
C) north or south pole-no difference. 
A) north pole. 
B) south pole. 
C) north or south pole-no difference.

Question 3

The rapid alteration of a magnetic field induces

Accepted Answer

A) an electric field. 
B) a stronger magnetic field. 
C) both 
D) neither 
A) an electric field. 
B) a stronger magnetic field. 
C) both 
D) neither

Question 4

The rule for the interaction of magnetic poles is similar to the rule for electric

Accepted Answer

A) circuits. 
B) polarization. 
C) charges. 
A) circuits. 
B) polarization. 
C) charges.

Question 5

Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is

Accepted Answer

A) relatively small. 
B) equally huge. 
C) not enough information 
A) relatively small. 
B) equally huge. 
C) not enough information

Question 6

Magnetism is due to the motion of electrons as they

Accepted Answer

A) move around the nucleus. 
B) spin on their axes. 
C) both 
D) neither 
A) move around the nucleus. 
B) spin on their axes. 
C) both 
D) neither

Question 7

What correction do you make to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit.

Accepted Answer

You remind your friend of the conservati

Question 8

A galvanometer is a useful device in electric

Accepted Answer

A) electromagnets. 
B) transformers. 
C) generators and motors. 
D) meters. 
E) none of the above 
A) electromagnets. 
B) transformers. 
C) generators and motors. 
D) meters. 
E) none of the above

Question 9

An electric motor and electric generator are

Accepted Answer

A) very similar devices. 
B) entirely different devices. 
C) none of the above 
A) very similar devices. 
B) entirely different devices. 
C) none of the above

Question 10

When a magnet is thrust into a coil that has twice the number of loops, the induced voltage is

Accepted Answer

A) half. 
B) the same, no different. 
C) twice as much. 
D) four times as much. 
E) none of the above 
A) half. 
B) the same, no different. 
C) twice as much. 
D) four times as much. 
E) none of the above

Question 11

Moving electric charges will interact with

Accepted Answer

A) an electric field. 
B) a magnetic field. 
C) both 
D) none of the above 
A) an electric field. 
B) a magnetic field. 
C) both 
D) none of the above

Question 12

Thrust a magnet into a coil of wire and you'll induce

Accepted Answer

A) voltage. 
B) current. 
C) both 
D) neither 
A) voltage. 
B) current. 
C) both 
D) neither

Question 13

A device that transforms electrical energy to mechanical energy is a

Accepted Answer

A) generator. 
B) motor. 
C) transformer. 
D) magnet. 
E) none of the above 
A) generator. 
B) motor. 
C) transformer. 
D) magnet. 
E) none of the above

Question 14

An electric generator of itself

Accepted Answer

A) can produce enough energy to light cities. 
B) cannot produce energy, but convert energy of other forms to electric energy. 
C) neither 
A) can produce enough energy to light cities. 
B) cannot produce energy, but convert energy of other forms to electric energy. 
C) neither

Question 15

When a current-carrying wire in a magnetic field experiences no force it is likely

Accepted Answer

A) upside down relative to the field. 
B) overly insulated. 
C) parallel to the field lines. 
D) all of the above 
A) upside down relative to the field. 
B) overly insulated. 
C) parallel to the field lines. 
D) all of the above

Question 16

The voltage across the input terminals of a transformer is 110 V. The primary coil has 50 loops and the secondary has 25 loops. The output is

Accepted Answer

A) 25 V. 
B) 55 V. 
C) 110 V. 
D) 220 V. 
E) none of the above 
A) 25 V. 
B) 55 V. 
C) 110 V. 
D) 220 V. 
E) none of the above

Question 17

If the primary of a transformer were connected to a dc power source, the transformer would have a voltage output

Accepted Answer

A) at a higher efficiency than with an ac source. 
B) the same. 
C) that is also dc. 
D) only briefly while being connected or disconnected. 
E) none of the above 
A) at a higher efficiency than with an ac source. 
B) the same. 
C) that is also dc. 
D) only briefly while being connected or disconnected. 
E) none of the above

Question 18

Compared to a motor, a generator is

Accepted Answer

A) one and the same. 
B) its opposite. 
C) of an entirely different design. 
A) one and the same. 
B) its opposite. 
C) of an entirely different design.

Question 19

Electric and magnetic fields combine to produce

Accepted Answer

A) sound. 
B) light. 
C) both 
D) neither 
A) sound. 
B) light. 
C) both 
D) neither

Question 20

Alternating current is normally produced by a

Accepted Answer

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

Exam 9: Magnetism and Electromagnetic Induction

The main difference between a generator and a motor involves which terminal is

Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a

The rapid alteration of a magnetic field induces

The rule for the interaction of magnetic poles is similar to the rule for electric

Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is

Magnetism is due to the motion of electrons as they

What correction do you make to a friend who states that a step-up transformer boosts energy, while a step-down transformer reduces energy in a circuit.

A galvanometer is a useful device in electric

An electric motor and electric generator are

When a magnet is thrust into a coil that has twice the number of loops, the induced voltage is

Moving electric charges will interact with

Thrust a magnet into a coil of wire and you'll induce

A device that transforms electrical energy to mechanical energy is a

An electric generator of itself

When a current-carrying wire in a magnetic field experiences no force it is likely

The voltage across the input terminals of a transformer is 110 V. The primary coil has 50 loops and the secondary has 25 loops. The output is

If the primary of a transformer were connected to a dc power source, the transformer would have a voltage output

Compared to a motor, a generator is

Electric and magnetic fields combine to produce

Alternating current is normally produced by a

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

Static and Current Electricity

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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