Physics Exam 3 Multiple Choice
Questions And Correct Answers.
Indicate which of the following will produce a magnetic field:
a. A moving electric charge
b. An electric current
c. The voltage of a battery not connected to anything
d. A magnet
e. An electric charge at rest
f. A piece of any metal
g. An ordinary piece of iron
h. The Earth - Answer a. A moving electric charge
b. An electric current
d. A magnet
h. The Earth
When a charged particle moves parallel to the direction of a magnetic field, the particle travels
in a:
a. Straight line
b. Helical path
c. Circular path
d. Hysteresis loop - Answer a. Straight line
As a proton moves through space, it creates:
a. An electric field only
b. A magnetic field
c. Both an electric and magnetic field
d. Nothing; the electric and magnetic fields cancel each other out - Answer c. Both an electric
and magnetic field
Which statements about the force on a charged particle placed in a magnetic field are true?
, e. The force causes the particle to gain kinetic energy - Answer b. A magnetic force is exerted
only if the particle is moving
At a particular instant, an electron moves toward the east in a uniform magnetic field that is
directed straight downward. The magnetic force that acts on it is:
a. Toward the south
b. Downward
c. Upward
d. Toward the north
e. Zero - Answer a. Toward the south
In a certain velocity selector consisting of perpendicular electric and magnetic fields, the
charged particles move toward the east, and the magnetic field is directed to the north. What
direction should the electric field point?
a. Upward
b. Toward the south
c. Toward the east
d. Downward
e. Toward the west - Answer d. Downward
An election is projected vertically upward with a speed of 1.70 x 10^6 m/s into a uniform
magnetic field of 0.640 T that is directed horizontally away from the observer. Describe the
electron's path in this field?
a. The electron will move in a straight line with acceleration
b. The electron will move in a straight line without acceleration
c. The electron will move in a counterclockwise path if viewed in the direction of the magnetic
field
d. The electron will move in a clockwise circular path if viewed in the direction of the magnetic
field - Answer d. The electron will move in a clockwise circular path if viewed in the direction
of the magnetic field
For a charged particle, a constant magnetic field can be used to change:
a. Only the direction of the particle's velocity
b. Only the magnitude of the particle's velocity
Questions And Correct Answers.
Indicate which of the following will produce a magnetic field:
a. A moving electric charge
b. An electric current
c. The voltage of a battery not connected to anything
d. A magnet
e. An electric charge at rest
f. A piece of any metal
g. An ordinary piece of iron
h. The Earth - Answer a. A moving electric charge
b. An electric current
d. A magnet
h. The Earth
When a charged particle moves parallel to the direction of a magnetic field, the particle travels
in a:
a. Straight line
b. Helical path
c. Circular path
d. Hysteresis loop - Answer a. Straight line
As a proton moves through space, it creates:
a. An electric field only
b. A magnetic field
c. Both an electric and magnetic field
d. Nothing; the electric and magnetic fields cancel each other out - Answer c. Both an electric
and magnetic field
Which statements about the force on a charged particle placed in a magnetic field are true?
, e. The force causes the particle to gain kinetic energy - Answer b. A magnetic force is exerted
only if the particle is moving
At a particular instant, an electron moves toward the east in a uniform magnetic field that is
directed straight downward. The magnetic force that acts on it is:
a. Toward the south
b. Downward
c. Upward
d. Toward the north
e. Zero - Answer a. Toward the south
In a certain velocity selector consisting of perpendicular electric and magnetic fields, the
charged particles move toward the east, and the magnetic field is directed to the north. What
direction should the electric field point?
a. Upward
b. Toward the south
c. Toward the east
d. Downward
e. Toward the west - Answer d. Downward
An election is projected vertically upward with a speed of 1.70 x 10^6 m/s into a uniform
magnetic field of 0.640 T that is directed horizontally away from the observer. Describe the
electron's path in this field?
a. The electron will move in a straight line with acceleration
b. The electron will move in a straight line without acceleration
c. The electron will move in a counterclockwise path if viewed in the direction of the magnetic
field
d. The electron will move in a clockwise circular path if viewed in the direction of the magnetic
field - Answer d. The electron will move in a clockwise circular path if viewed in the direction
of the magnetic field
For a charged particle, a constant magnetic field can be used to change:
a. Only the direction of the particle's velocity
b. Only the magnitude of the particle's velocity
