Transcript Chapter 17 clicker questions

Chapter 17 Clickers
Magnetism
Prepared by
Dedra Demaree,
Georgetown University
© 2014 Pearson Education, Inc.
Voting question
If you split a magnet in half, you will have:
a) One half that is a north pole and one half that is a
south pole.
b) Two halves that are both north poles.
c) Two halves that are both south poles.
© 2014 Pearson Education, Inc.
Voting question
If you split a magnet in half, you will have:
a) One half that is a north pole and one half that is
a south pole.
b) Two halves that are both north poles.
c) Two halves that are both south poles.
© 2014 Pearson Education, Inc.
Voting question
Earth's geographic north pole is:
a) A magnetic north pole.
b) A magnetic south pole.
c) Not a magnetic pole.
© 2014 Pearson Education, Inc.
Voting question
Earth's geographic north pole is:
a) A magnetic north pole.
b) A magnetic south pole.
c) Not a magnetic pole.
© 2014 Pearson Education, Inc.
Voting question
When the south pole of the bar magnet is brought
closer to the compass, the compass needle will:
a) Not rotate.
b) Rotate so that its south pole is closer to the south
pole of the bar magnet.
c) Rotate so that its north pole is closer to the south
pole of the bar magnet.
© 2014 Pearson Education, Inc.
Voting question
When the south pole of the bar magnet is brought
closer to the compass, the compass needle will:
a) Not rotate.
b) Rotate so that its south pole is closer to the south
pole of the bar magnet.
c) Rotate so that its north pole is closer to the
south pole of the bar magnet.
© 2014 Pearson Education, Inc.
Voting question
The compasses in the figure indicate that:
a) The magnetic field lines between the ends of the
horseshoe magnet point from south to north.
b) The magnetic field lines between the ends of the
horseshoe magnet point from north to south.
c) The magnetic field lines between the ends of the
horseshoe magnet point straight up.
© 2014 Pearson Education, Inc.
Voting question
The compasses in the figure indicate that:
a) The magnetic field lines between the ends of the
horseshoe magnet point from south to north.
b) The magnetic field lines between the ends of the
horseshoe magnet point from north to south.
c) The magnetic field lines between the ends of the
horseshoe magnet point straight up.
© 2014 Pearson Education, Inc.
Voting question
A compass needle rotating near a current-carrying
wire is evidence that:
a) The current produces an electric field.
b) The current produces a magnetic field.
c) Both of the above.
d) Neither of the above.
© 2014 Pearson Education, Inc.
Voting question
A compass needle rotating near a current-carrying
wire is evidence that:
a) The current produces an electric field.
b) The current produces a magnetic field.
c) Both of the above.
d) Neither of the above.
© 2014 Pearson Education, Inc.
Voting question
For a horizontal current-carrying wire with current to
the right, use the right-hand rule to determine the
direction of the magnetic field above the wire.
a) The magnetic field points to the right.
b) The magnetic field points to the left.
c) The magnetic field points into the page.
d) The magnetic field points out of the page.
© 2014 Pearson Education, Inc.
Voting question
For a horizontal current-carrying wire with current to
the right, use the right-hand rule to determine the
direction of the magnetic field above the wire.
a) The magnetic field points to the right.
b) The magnetic field points to the left.
c) The magnetic field points into the page.
d) The magnetic field points out of the page.
© 2014 Pearson Education, Inc.
Voting question
Using the right-hand rule for the magnetic force,
determine the direction of the force on a current-carrying
wire in the following situation. The current is upward; the
magnetic field is out of the page. The force is:
a) Upward.
b) Out of the page.
c) To the right.
d) To the left.
© 2014 Pearson Education, Inc.
Voting question
Using the right-hand rule for the magnetic force,
determine the direction of the force on a current-carrying
wire in the following situation. The current is upward; the
magnetic field is out of the page. The force is:
a) Upward.
b) Out of the page.
c) To the right.
d) To the left.
© 2014 Pearson Education, Inc.
Voting question
A current flows to the left in a wire that is just above
another wire with a current that flows to the right. Which
of the following statements is correct?
a) The wires will attract each other.
b) The wires will repel each other.
c) The wires will not interact.
d) The wires will rotate.
© 2014 Pearson Education, Inc.
Voting question
A current flows to the left in a wire that is just above
another wire with a current that flows to the right. Which
of the following statements is correct?
a) The wires will attract each other.
b) The wires will repel each other.
c) The wires will not interact.
d) The wires will rotate.
© 2014 Pearson Education, Inc.
Voting question
The magnetic force exerted on a current:
a) Increases with the strength of the current.
b) Increases with the length of the current-carrying wire.
c) Increases with the strength of the magnetic field.
d) All of the above.
e) None of the above.
© 2014 Pearson Education, Inc.
Voting question
The magnetic force exerted on a current:
a) Increases with the strength of the current.
b) Increases with the length of the current-carrying wire.
c) Increases with the strength of the magnetic field.
d) All of the above.
e) None of the above.
© 2014 Pearson Education, Inc.
Voting question
A current-carrying wire is oriented perpendicular to a
magnetic field. The current in the wire is 2 A, the
magnetic field has a strength of 5 T, and the length
of the wire is 1 m. What is the force felt on the
current-carrying wire due to the magnetic field?
a) 0 N
b) 2 N
c) 5 N
d) 10 N
© 2014 Pearson Education, Inc.
Voting question
A current-carrying wire is oriented perpendicular to a
magnetic field. The current in the wire is 2 A, the
magnetic field has a strength of 5 T, and the length
of the wire is 1 m. What is the force felt on the
current-carrying wire due to the magnetic field?
a) 0 N
b) 2 N
c) 5 N
d) 10 N
© 2014 Pearson Education, Inc.
Voting question
The torque that magnetic forces exert on a currentcarrying coil:
a) Decreases with the number of loops in the coil.
b) Increases with the angle between the plane of the
coil's surface and the direction of the magnetic field.
c) Decreases with the area of the loop.
d) Increases with the strength of the current.
© 2014 Pearson Education, Inc.
Voting question
The torque that magnetic forces exert on a currentcarrying coil:
a) Decreases with the number of loops in the coil.
b) Increases with the angle between the plane of the
coil's surface and the direction of the magnetic field.
c) Decreases with the area of the loop.
d) Increases with the strength of the current.
© 2014 Pearson Education, Inc.
Voting question
Which of the following statements is NOT correct
about the magnetic dipole moment?
a) The direction of the dipole moment vector is
perpendicular to the surface of the loop.
b) The bigger the dipole moment, the greater the
torque that an external magnetic field exerts on it.
c) The magnetic dipole moment is the product of the
current in an area of a loop.
d) All of the above are correct.
© 2014 Pearson Education, Inc.
Voting question
Which of the following statements is NOT correct
about the magnetic dipole moment?
a) The direction of the dipole moment vector is
perpendicular to the surface of the loop.
b) The bigger the dipole moment, the greater the
torque that an external magnetic field exerts on it.
c) The magnetic dipole moment is the product of the
current in an area of a loop.
d) All of the above are correct.
© 2014 Pearson Education, Inc.
Voting question
The magnetic force exerted by a magnetic field on an
individual charged particle:
a) Increases with the speed of the particle.
b) Increases with the charge of the particle.
c) Increases with the strength of the magnetic field.
d) All of the above.
e) None of the above.
© 2014 Pearson Education, Inc.
Voting question
The magnetic force exerted by a magnetic field on an
individual charged particle:
a) Increases with the speed of the particle.
b) Increases with the charge of the particle.
c) Increases with the strength of the magnetic field.
d) All of the above.
e) None of the above.
© 2014 Pearson Education, Inc.
Voting question
Using the right-hand rule for the magnetic force
exerted by a magnetic field on a charged particle, we
can determine that if the positively charged particle is
moving into the page and the magnetic field is to the
right, then the force is:
a) Into the page.
b) To the right.
c) Upward.
d) Downward.
© 2014 Pearson Education, Inc.
Voting question
Using the right-hand rule for the magnetic force
exerted by a magnetic field on a charged particle, we
can determine that if the positively charged particle is
moving into the page and the magnetic field is to the
right, then the force is:
a) Into the page.
b) To the right.
c) Upward.
d) Downward.
© 2014 Pearson Education, Inc.
Voting question
There is a positively charged particle at each of the
points A, B, C, and D. Which particle will feel a force
that is into the page?
a) A
b) B
c) C
d) D
© 2014 Pearson Education, Inc.
Voting question
There is a positively charged particle at each of the
points A, B, C, and D. Which particle will feel a force
that is into the page?
a) A
b) B
c) C
d) D
© 2014 Pearson Education, Inc.
Voting question
The particle at point A has a charge of +2.0 x 10−6 C
and is moving at a speed of 3.0 x 107 m/s in the
direction shown. What is the magnitude of the force
from the magnetic field on the charged particle?
a) 0 N
b) 4.8 N
c) 6 N
d) 12 N
© 2014 Pearson Education, Inc.
Voting question
The particle at point A has a charge of +2.0 x 10−6 C
and is moving at a speed of 3.0 x 107 m/s in the
direction shown. What is the magnitude of the force
from the magnetic field on the charged particle?
a) 0 N
b) 4.8 N
c) 6 N
d) 12 N
© 2014 Pearson Education, Inc.
Voting question
The magnetic field produced by a straight currentcarrying wire:
a) Decreases as you move farther from the wire.
b) Decreases as the strength of the current decreases.
c) Both of the above.
d) None of the above.
© 2014 Pearson Education, Inc.
Voting question
The magnetic field produced by a straight currentcarrying wire:
a) Decreases as you move farther from the wire.
b) Decreases as the strength of the current decreases.
c) Both of the above.
d) None of the above.
© 2014 Pearson Education, Inc.
Voting question
The magnetic field at the center of a loop with current I
and a radius of 2 m is 4 T. What would be the
magnetic field if the radius were changed to 1 m and
the current stayed the same?
a) 2 T
b) 4 T
c) 8 T
d) 16 T
© 2014 Pearson Education, Inc.
Voting question
The magnetic field at the center of a loop with current I
and a radius of 2 m is 4 T. What would be the magnetic
field if the radius were changed to 1 m and the current
stayed the same?
a) 2 T
b) 4 T
c) 8 T
d) 16 T
© 2014 Pearson Education, Inc.