Magnetic Fields
Practice Test
1.
A nail that touches a magnet will __________.
a.
generate an electric current
b.
melt
c.
demagnetize the magnet
d.
become polarized
Hint
2.
Magnetic field lines travel from __________.
a.
south pole to north pole outside the magnet
b.
in a circle around the entire magnet, while never touching the magnet
c.
north pole to south pole through the magnet
d.
north pole to south pole outside the magnet
Hint
3.
In Figure 24-16, if the current in the wire were reversed, what would the direction of the magnetic force be?
a.
up
b.
down
c.
right
d.
left
Hint
4.
A magnetic field exerts a force on __________.
a.
only small particles
b.
only electrons
c.
all charged particles, regardless of size
d.
only wires
Hint
