Transcript The phenomenon of magnetism is best understood in terms of

Magnetism
The phenomenon of magnetism is best
understood in terms of
A. the existence of magnetic poles.
B. the magnetic fields associated with
the movement of charged particles.
C. gravitational forces between nuclei
and orbital electrons.
D. electrical fluids.
E. None of these is correct.
The phenomenon of magnetism is best
understood in terms of
A. the existence of magnetic poles.
B. the magnetic fields associated
with the movement of charged
particles.
C. gravitational forces between nuclei
and orbital electrons.
D. electrical fluids.
E. None of these is correct.
The left diagram shows a positively
charged particle is moving with velocity v in
a magnetic field B. Using the arrows in the
right diagram, what is the direction of the
magnetic force on the particle?
The left diagram shows a positively
charged particle is moving with velocity v in
a magnetic field B. Using the arrows in the
right diagram, what is the direction of the
magnetic force on the particle?
The left diagram shows a force F on a
negatively charged particle moving a
magnetic field B. Using the arrows in the
right diagram, what is the direction of the
velocity of the particle?
The left diagram shows a force F on a
negatively charged particle moving a
magnetic field B. Using the arrows in the
right diagram, what is the direction of the
velocity of the particle?
If the magnetic field vector is directed
toward the north and a positively charged
particle is moving toward the east, what is
the direction of the magnetic force on the
particle?
A. up
B. west
C. south
D. down
E. east
If the magnetic field vector is directed
toward the north and a positively charged
particle is moving toward the east, what is
the direction of the magnetic force on the
particle?
A. up
B. west
C. south
D. down
E. east
A positively charged particle is moving
northward in a magnetic field. The
magnetic force on the particle is toward
the northeast. What is the direction of the
magnetic field?
A. up
B. northeast
C. southwest
D. down
E. This situation cannot exist.
A positively charged particle is moving
northward in a magnetic field. The
magnetic force on the particle is toward
the northeast. What is the direction of the
magnetic field?
A. up
B. northeast
C. southwest
D. down
E. This situation cannot exist.
The magnetic force on a charged particle
A. depends on the sign of the charge on
the particle.
B. depends on the velocity of the particle.
C. depends on the magnetic field at the
particle's instantaneous position.
D. is at right angles to both the velocity
and the direction of the magnetic field.
E. is described by all of these.
The magnetic force on a charged particle
A. depends on the sign of the charge on
the particle.
B. depends on the velocity of the particle.
C. depends on the magnetic field at the
particle's instantaneous position.
D. is at right angles to both the velocity
and the direction of the magnetic field.
E. is described by all of these.
An electron is traveling horizontally east
in the magnetic field of the earth near the
equator. The direction of the force on the
electron is
A. zero
B. north
C. south
D. upward
E. downward
An electron is traveling horizontally east
in the magnetic field of the earth near the
equator. The direction of the force on the
electron is
A. zero
B. north
C. south
D. upward
E. downward
A current I flows in a wire that is oriented
as shown. Which of the vectors represent
the magnetic field that results in a
maximum force on the wire?
A current I flows in a wire that is oriented
as shown. Which of the vectors represent
the magnetic field that results in a
maximum force on the wire?
A small positively charged body is moving
horizontally and westward. If it enters a
uniform horizontal magnetic field that is
directed from north to south, the body is
deflected
A. upward.
B. downward.
C. toward the north.
D. toward the south.
E. not at all.
A small positively charged body is moving
horizontally and westward. If it enters a
uniform horizontal magnetic field that is
directed from north to south, the body is
deflected
A. upward.
B. downward.
C. toward the north.
D. toward the south.
E. not at all.
A uniform magnetic field is
parallel to and in the direction
of the positive z axis. For an
electron to enter this field and
not be deflected by the field,
the electron must be traveling
in which direction?
A. any direction as long as it is in the xy plane.
B. any direction as long as it is in the xz plane.
C. along the x axis.
D. along the y axis.
E. along the z axis.
A uniform magnetic field is
parallel to and in the direction
of the positive z axis. For an
electron to enter this field and
not be deflected by the field,
the electron must be traveling
in which direction?
A. any direction as long as it is in the xy plane.
B. any direction as long as it is in the xz plane.
C. along the x axis.
D. along the y axis.
E. along the z axis.
Two wires lying in the plane of this page carry
equal currents in opposite directions, as shown. At
a point midway between the wires, the magnetic
field is
A. zero.
B. into the page.
C. out of the page.
D. toward the top or bottom of the
page.
E. toward one of the two wires.
Two wires lying in the plane of this page carry
equal currents in opposite directions, as shown. At
a point midway between the wires, the magnetic
field is
A. zero.
B. into the page.
C. out of the page.
D. toward the top or bottom of the
page.
E. toward one of the two wires.
What is the direction of the magnetic field around a
wire carrying a current perpendicularly into this
page?
A. The field is parallel to and in the same
direction as the current flow.
B. It is parallel to but directed opposite to
the current flow.
C. It is counterclockwise around the wire in
the plane of the page.
D. It is clockwise around the wire in the
plane of the page.
E. None of these is correct.
What is the direction of the magnetic field around a
wire carrying a current perpendicularly into this
page?
A. The field is parallel to and in the same
direction as the current flow.
B. It is parallel to but directed opposite to
the current flow.
C. It is counterclockwise around the wire in
the plane of the page.
D. It is clockwise around the wire in the
plane of the page.
E. None of these is correct.
A wire carries an electric current straight out
of the page. What is the direction of the
magnetic field due to the current north of the
wire?
A. north
B. east
C. west
D. south
E. upward
A wire carries an electric current straight out
of the page. What is the direction of the
magnetic field due to the current north of the
wire?
A. north
B. east
C. west
D. south
E. upward
A long conductor carrying current I lies in the
xz plane parallel to the z axis. The current
travels in the negative z direction, as shown
in the figure. The vector that represents the
magnetic field at the origin O is

A. 1

B. 2

C. 3

D. 4

E. 5
A long conductor carrying current I lies in the
xz plane parallel to the z axis. The current
travels in the negative z direction, as shown
in the figure. The vector that represents the
magnetic field at the origin O is

A. 1

B. 2

C. 3

D. 4

E. 5
Two straight wires perpendicular to the plane of this
page are shown in the figure. The currents in the
wires are the same. The current in M is into the
page and the current in N is out of the page. The
vector that represents the resultant magnetic field
at point P is
D.

1

2

3

4
E.
Noneof theseis correct.
A.
B.
C.
Two straight wires perpendicular to the plane of this
page are shown in the figure. The currents in the
wires are the same. The current in M is into the
page and the current in N is out of the page. The
vector that represents the resultant magnetic field
at point P is
D.

1

2

3

4
E.
Noneof theseis correct.
A.
B.
C.
Two very long, parallel conducting
wires carry equal currents in the
same direction, as shown. The
numbered diagrams show end
views of the wires and the
resultant force vectors due to
current flow in each wire. Which
diagram best represents the
direction of the forces?
Two very long, parallel conducting
wires carry equal currents in the
same direction, as shown. The
numbered diagrams show end
views of the wires and the
resultant force vectors due to
current flow in each wire. Which
diagram best represents the
direction of the forces?
Two very long, parallel conducting
wires carry equal currents in
opposite directions. The numbered
diagrams show end views of the
wires and the resultant force
vectors due to current flow in each
wire. Which diagram best
represents the direction of the
forces?
Two very long, parallel conducting
wires carry equal currents in
opposite directions. The numbered
diagrams show end views of the
wires and the resultant force
vectors due to current flow in each
wire. Which diagram best
represents the direction of the
forces?