Question 1

When current reverses direction in a wire, the surrounding magnetic field

Accepted Answer

A) also reverses direction. 
B) becomes momentarily stronger. 
C) contracts. 
D) expands. 
A) also reverses direction. 
B) becomes momentarily stronger. 
C) contracts. 
D) expands.

Question 2

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

Accepted Answer

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

Question 3

Magnetic field lines about a current-carrying wire

Accepted Answer

A) extend radially from the wire. 
B) circle the wire in closed loops. 
C) both of these 
D) neither of these 
A) extend radially from the wire. 
B) circle the wire in closed loops. 
C) both of these 
D) neither of these

Question 4

Like kinds of magnetic poles repel while unlike kinds of magnetic poles

Accepted Answer

A) attract. 
B) repel also. 
C) may attract or repel. 
A) attract. 
B) repel also. 
C) may attract or repel.

Question 5

Surrounding every stationary electron is

Accepted Answer

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

Question 6

An electron beam directed through a magnetic field

Accepted Answer

A) may be deflected. 
B) may experience a force. 
C) both of these 
D) neither of these 
A) may be deflected. 
B) may experience a force. 
C) both of these 
D) neither of these

Question 7

Pigeons navigate primarily by

Accepted Answer

A) a good memory. 
B) a keen sense of smell. 
C) magnetic sensors in their heads. 
D) ultra-high-pitched sounds. 
E) none of the above 
A) a good memory. 
B) a keen sense of smell. 
C) magnetic sensors in their heads. 
D) ultra-high-pitched sounds. 
E) none of the above

Question 8

The force on an electron moving in a magnetic field will be least when its direction is

Accepted Answer

A) the same as the magnetic field direction. 
B) perpendicular to the magnetic field direction. 
C) either of these 
D) neither of these 
A) the same as the magnetic field direction. 
B) perpendicular to the magnetic field direction. 
C) either of these 
D) neither of these

Question 9

A galvanometer can be calibrated to measure

Accepted Answer

A) electric current. 
B) electric voltage. 
C) both of these 
D) none of these 
A) electric current. 
B) electric voltage. 
C) both of these 
D) none of these

Question 10

The lift experienced by Maglev trains is due to magnetic

Accepted Answer

A) attraction. 
B) repulsion. 
C) dipoles. 
A) attraction. 
B) repulsion. 
C) dipoles.

Question 11

A beam of singly-charged ions entering a magnetic field are swept into circular paths. The wider paths are those of

Accepted Answer

A) the lighter ions. 
B) the heavier ions. 
C) neither particularly. 
A) the lighter ions. 
B) the heavier ions. 
C) neither particularly.

Question 12

The shape of a magnetic field surrounding a current-carrying conductor is

Accepted Answer

A) consistent with the inverse-square law. 
B) radial. 
C) circular. 
D) all of these 
E) neither of these 
A) consistent with the inverse-square law. 
B) radial. 
C) circular. 
D) all of these 
E) neither of these

Question 13

Place an iron rod inside a current-carrying coil of wire and you

Accepted Answer

A) increase the strength of the electromagnet. 
B) have a superconducting magnet. 
C) a magplane in the making. 
A) increase the strength of the electromagnet. 
B) have a superconducting magnet. 
C) a magplane in the making.

Question 14

The source of all magnetism is

Accepted Answer

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

Question 15

The magnetic fields of a pair of nearby magnets can

Accepted Answer

A) only add. 
B) cannot add or subtract. 
C) add or subtract by vector rules. 
A) only add. 
B) cannot add or subtract. 
C) add or subtract by vector rules.

Question 16

Into which stable force field can a proton be placed at rest without being acted upon by a force?

Accepted Answer

A) magnetic field 
B) electric field 
C) both of these 
D) neither of these 
A) magnetic field 
B) electric field 
C) both of these 
D) neither of these

Question 17

Cosmic rays penetrate your body when

Accepted Answer

A) safely in your home. 
B) outdoors. 
C) in mountainous regions. 
D) all of the above 
E) none of the above 
A) safely in your home. 
B) outdoors. 
C) in mountainous regions. 
D) all of the above 
E) none of the above

Question 18

Surrounding every magnet is

Accepted Answer

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

Question 19

In general, a common magnet has

Accepted Answer

A) one pole. 
B) at least two poles. 
C) only two poles. 
A) one pole. 
B) at least two poles. 
C) only two poles.

Question 20

An iron nail is more strongly attracted to the

Accepted Answer

A) north pole of a magnet. 
B) south pole of a magnet. 
C) either of these 
D) neither of these 
A) north pole of a magnet. 
B) south pole of a magnet. 
C) either of these 
D) neither of these

Exam 24: Magnetism

When current reverses direction in a wire, the surrounding magnetic field

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

Magnetic field lines about a current-carrying wire

Like kinds of magnetic poles repel while unlike kinds of magnetic poles

Surrounding every stationary electron is

An electron beam directed through a magnetic field

Pigeons navigate primarily by

The force on an electron moving in a magnetic field will be least when its direction is

A galvanometer can be calibrated to measure

The lift experienced by Maglev trains is due to magnetic

A beam of singly-charged ions entering a magnetic field are swept into circular paths. The wider paths are those of

The shape of a magnetic field surrounding a current-carrying conductor is

Place an iron rod inside a current-carrying coil of wire and you

The source of all magnetism is

The magnetic fields of a pair of nearby magnets can

Into which stable force field can a proton be placed at rest without being acted upon by a force?

Cosmic rays penetrate your body when

Surrounding every magnet is

In general, a common magnet has

An iron nail is more strongly attracted to the

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