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WorksheetsChapter 10 - Magnetic Fields
Total questions: 12
Worksheet time: 6mins
An object that is magnetic has ____ .
only a south-seeking pole
only a south-seeking pole
an east-seeking pole and a west-seeking pole
a north-seeking pole and a south-seeking pole
The magnitude of the current in a wire is ____ to the magnetic field around the wire.
proportional
inversely proportional
equal
parallel
Increasing the number of loops in an electromagnet causes the strength of the magnetic field to ____.
increase
decrease
remain the same
remain the same
The magnetic force on a current-carrying wire in a magnetic field is ____ the direction of
the current.
opposite
parallel to
perpendicular to
the same as
What happens if you cut a magnet in half?
it becomes demagnetized
you get a separate south pole and a separate north pole
you get monopoles
you get two magnets
Magnetic domains are __________ in a magnet.
scattered
aligned
misaligned
random
How can you make a magnet out of a long strand of wire and an iron bar?
Send a current through the bar.
Spin the bar over the wire as a current runs through it.
Wrap the wire around the bar, and send a current through it.
Attach the wire to either end of the bar, and send a current through it. Attach the wire to either end of the bar, and send a current through it.
If current is reduced in an electromagnet, what happens to the magnetic field strength?
it cancels out the magnetic field
it remains the same
it is reduced
it increases it increases
A nail that touches a magnet will __________.
melt
generate an electric current
demagnetize the magnet
become polarized become polarized
In the figure below, if the magnetic poles were reversed, what would the direction of the magnetic force be?
right
down
up
left
A straight wire that carries a 4.6-A current is in a uniform magnetic field oriented at right angles to the wire. The magnetic field has a strength of 1.2 T. If the force exerted on the wire is 0.60 N, what length of wire is in the magnetic field?
0.16 m
0.11 m
2.3 m
3.3 m
An electron moving at 5.6×107 m/s travels through a uniform magnetic field of 1.4 T at right angles to the field. How strong is the force that acts on the electron?
-1.3×10-11 N
-3.7×10-11 N
1.5×10-11 N
2.2×10-11 N
