Question 1

The source of all magnetism is

Accepted Answer

A)  tiny domains of aligned atoms. 
B)  moving electric charge. 
C)  ferromagnetic materials. 
D)  tiny pieces of iron. 
E)  none of these 
A)  tiny domains of aligned atoms. 
B)  moving electric charge. 
C)  ferromagnetic materials. 
D)  tiny pieces of iron. 
E)  none of these B

Question 2

Magnetic compasses apparently were first used by

Accepted Answer

A)  Greeks. 
B)  Australian aborigines. 
C)  Columbus. 
D)  Vikings. 
E)  pigeons, then Chinese. 
A)  Greeks. 
B)  Australian aborigines. 
C)  Columbus. 
D)  Vikings. 
E)  pigeons, then Chinese. E

Question 3

Electric power can be transmitted from one place to another without the need for connecting wires in between. This statement is

Accepted Answer

A)  sometimes true. 
B)  always true. 
C)  always false. 
A)  sometimes true. 
B)  always true. 
C)  always false. A

Question 4

If a compass is moved from the northern hemisphere to the southern hemisphere, its magnetic needle will change direction

Accepted Answer

A)  hardly at all. 
B)  by 90 degrees. 
C)  depending on where the measurement is taken. 
D)  by 180 degrees. 
E)  none of these 
A)  hardly at all. 
B)  by 90 degrees. 
C)  depending on where the measurement is taken. 
D)  by 180 degrees. 
E)  none of these

Question 5

Rapid change of a magnetic field induces

Accepted Answer

A)  an electric field. 
B)  a magnetic field of the same magnitude. 
C)  a magnetic field of greater magnitude. 
A)  an electric field. 
B)  a magnetic field of the same magnitude. 
C)  a magnetic field of greater magnitude.

Question 6

If we think of the Earth as a magnet, its north (-seeking) pole is nearest

Accepted Answer

A)  Australia. 
B)  the Hudson Bay region of Canada. 
C)  both of these 
A)  Australia. 
B)  the Hudson Bay region of Canada. 
C)  both of these

Question 7

An iron rod becomes magnetic when

Accepted Answer

A)  its electrons stop moving and point in the same direction. 
B)  positive ions accumulate at one end and negative ions at the other end. 
C)  its atoms are aligned having plus charges on one side and negative charges on the other. 
D)  the net spins of its electrons are in the same direction. 
E)  none of these 
A)  its electrons stop moving and point in the same direction. 
B)  positive ions accumulate at one end and negative ions at the other end. 
C)  its atoms are aligned having plus charges on one side and negative charges on the other. 
D)  the net spins of its electrons are in the same direction. 
E)  none of these

Question 8

Which force field can increase a moving electron's speed?

Accepted Answer

A)  only a magnetic field 
B)  only an electric field 
C)  either an electric or magnetic field 
D)  none of these 
A)  only a magnetic field 
B)  only an electric field 
C)  either an electric or magnetic field 
D)  none of these

Question 9

A principle difference between an MHD generator and a conventional generator is that the MHD generator

Accepted Answer

A)  has no moving parts. 
B)  operates more efficiently at high temperatures. 
C)  Choices A and B are both true. 
D)  Choices A and B are both false. 
A)  has no moving parts. 
B)  operates more efficiently at high temperatures. 
C)  Choices A and B are both true. 
D)  Choices A and B are both false.

Question 10

The output power of an ideal transformer is

Accepted Answer

A)  equal to the input power. 
B)  smaller than the input power. 
C)  greater than the input power. 
D)  may be any of these 
A)  equal to the input power. 
B)  smaller than the input power. 
C)  greater than the input power. 
D)  may be any of these

Question 11

A device that transforms electrical energy to mechanical energy is a

Accepted Answer

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

Question 12

Magnetism is due to the motion of electrons as they

Accepted Answer

A)  spin on their axes. 
B)  move around the nucleus. 
C)  Choices A and B are both correct. 
D)  None of the above choices are correct. 
A)  spin on their axes. 
B)  move around the nucleus. 
C)  Choices A and B are both correct. 
D)  None of the above choices are correct.

Question 13

A certain transformer doubles input voltage. If the primary coil has 10 A of current, then the current in the secondary coil is

Accepted Answer

A)  10 A. 
B)  2 A. 
C)  5 A. 
D)  25 A. 
E)  none of these 
A)  10 A. 
B)  2 A. 
C)  5 A. 
D)  25 A. 
E)  none of these

Question 14

Voltage can be induced in a wire by

Accepted Answer

A)  changing the current in a nearby wire. 
B)  moving a magnet near the wire. 
C)  moving the wire near a magnet. 
D)  Choices A, B, and C are all true. 
E)  None of the above choices are true. 
A)  changing the current in a nearby wire. 
B)  moving a magnet near the wire. 
C)  moving the wire near a magnet. 
D)  Choices A, B, and C are all true. 
E)  None of the above choices are true.

Question 15

When there is a change in the magnetic field in a closed loop of wire

Accepted Answer

A)  a current is created in the loop of wire. 
B)  a voltage is induced in the wire. 
C)  electromagnetic induction occurs. 
D)  all of these 
E)  none of these 
A)  a current is created in the loop of wire. 
B)  a voltage is induced in the wire. 
C)  electromagnetic induction occurs. 
D)  all of these 
E)  none of these

Question 16

An iron nail is more strongly attracted to the

Accepted Answer

A)  south pole of a magnet. 
B)  north pole of a magnet. 
C)  north or south pole - no difference really. 
A)  south pole of a magnet. 
B)  north pole of a magnet. 
C)  north or south pole - no difference really.

Question 17

When a bar magnet is thrust into a coil of copper wire, the coil tends to

Accepted Answer

A)  attract the magnet as it enters. 
B)  repel the magnet as it enters. 
C)  both of these 
D)  neither of these 
A)  attract the magnet as it enters. 
B)  repel the magnet as it enters. 
C)  both of these 
D)  neither of these

Question 18

Superconducting electromagnets

Accepted Answer

A)  may be possible in the distant future. 
B)  may be possible in the near future. 
C)  exist now. 
D)  are science fiction. 
A)  may be possible in the distant future. 
B)  may be possible in the near future. 
C)  exist now. 
D)  are science fiction.

Question 19

The intensity of cosmic rays bombarding the Earth's surface is largest at the

Accepted Answer

A)  equator. 
B)  mid-latitudes. 
C)  poles. 
A)  equator. 
B)  mid-latitudes. 
C)  poles.

Question 20

A wire moving at right angles to a magnetic field has NO induced voltage

Accepted Answer

A)  if it is moving very fast. 
B)  if it is moving slowly. 
C)  if the wire is covered with insulation. 
D)  if it is made of copper. 
E)  None of the above choices are correct. 
A)  if it is moving very fast. 
B)  if it is moving slowly. 
C)  if the wire is covered with insulation. 
D)  if it is made of copper. 
E)  None of the above choices are correct.

The source of all magnetism is

Magnetic compasses apparently were first used by

Electric power can be transmitted from one place to another without the need for connecting wires in between. This statement is

If a compass is moved from the northern hemisphere to the southern hemisphere, its magnetic needle will change direction

Rapid change of a magnetic field induces

If we think of the Earth as a magnet, its north (-seeking) pole is nearest

An iron rod becomes magnetic when

Which force field can increase a moving electron's speed?

A principle difference between an MHD generator and a conventional generator is that the MHD generator

The output power of an ideal transformer is

A device that transforms electrical energy to mechanical energy is a

Magnetism is due to the motion of electrons as they

A certain transformer doubles input voltage. If the primary coil has 10 A of current, then the current in the secondary coil is

Voltage can be induced in a wire by

When there is a change in the magnetic field in a closed loop of wire

An iron nail is more strongly attracted to the

When a bar magnet is thrust into a coil of copper wire, the coil tends to

Superconducting electromagnets

The intensity of cosmic rays bombarding the Earth's surface is largest at the

A wire moving at right angles to a magnetic field has NO induced voltage

About Science

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Temperature, Heat, and Thermodynamics

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Exam 11: Magnetism and Electromagnetic Induction

The source of all magnetism is

Magnetic compasses apparently were first used by

Electric power can be transmitted from one place to another without the need for connecting wires in between. This statement is

If a compass is moved from the northern hemisphere to the southern hemisphere, its magnetic needle will change direction

Rapid change of a magnetic field induces

If we think of the Earth as a magnet, its north (-seeking) pole is nearest

An iron rod becomes magnetic when

Which force field can increase a moving electron's speed?

A principle difference between an MHD generator and a conventional generator is that the MHD generator

The output power of an ideal transformer is

A device that transforms electrical energy to mechanical energy is a

Magnetism is due to the motion of electrons as they

A certain transformer doubles input voltage. If the primary coil has 10 A of current, then the current in the secondary coil is

Voltage can be induced in a wire by

When there is a change in the magnetic field in a closed loop of wire

An iron nail is more strongly attracted to the

When a bar magnet is thrust into a coil of copper wire, the coil tends to

Superconducting electromagnets

The intensity of cosmic rays bombarding the Earth's surface is largest at the

A wire moving at right angles to a magnetic field has NO induced voltage

About Science

Atoms

Equilibrium and Linear Motion

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Temperature, Heat, and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Waves and Sound

Light Waves

Properties of Light

Quantum Theory

The Atomic Nucleus and Radioactivity

Physics of Rotation and Equilibrium

Filters