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Worksheets4.1 Magnetic Fields APP2
Total questions: 46
Worksheet time: 34mins
Name
Class
Date
1.
A magnet whose domains align only in the presence of a strong magnetic field is a
a)
diamagnet
b)
paramagnet
c)
ferromagnet
d)
antiferromagnet
2.
Which end of a compass is the north pole of its magnet?
a)
Red
b)
Plain
c)
Neither
3.
Breaking a bar magnet in half will produce
a)
A single north magnetic monopole
b)
A single south magnetic monopole
c)
One north and one south monopole
d)
Two bar magnets
4.
The SI unit of magnetic field is
a)
weber
b)
guass
c)
tesla
d)
farad
5.
A horizontal wire carries a current out of the page. What direction is the magnetic field?
a)
Out of the page
b)
Left
c)
Clockwise
d)
Counter-clockwise
6.
Like magnetic poles repel or attract?
a)
Repel
b)
Attract
7.
At the geographic North Pole, a compass will point south.
a)
True
b)
False
8.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles.
d)
the middle.
9.
It is possible for a magnet to have only one pole.
a)
True
b)
False
10.
Magnetic fields interact with each other just like electric fields.
a)
True
b)
False
11.
Magnets have a north and a south ___________
a)
domain
b)
field
c)
pole
d)
region
12.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
ferromagnet
d)
semimagnet
13.
Magnets that are arranged like this will _______.
a)
move away from each other (repel)
b)
move towards each other (attract)
14.
Magnets that are arranged like this will _______.
a)
move away from each other (repel)
b)
move toward each other (attract)
15.
Are ALL metals magnetic?
a)
Yes
b)
No
16.
Region around a magnet in which magnetic force can act.
a)
Magnetic field
b)
Magnetic force
c)
Domain
d)
Perimeter
17.
There are several modern uses of magnets. Magnets allow high speed trains to ______________________ above the track. They go faster because without touching the tracks there is no friction to slow them down.
a)
collide
b)
levitate
c)
attract
d)
repair
18.
True or False: The Earth is a giant magnet
a)
True
b)
False
19.
What is responsible for creating Earth's magnetic poles?
a)
Charged particles in Earth's atmosphere
b)
Magnetic rocks in Earth's crust
c)
Earth's iron core
d)
The flow of ocean currents around Earth
20.
Are the magnetic field lines in the picture correct?
a)
Yes, because they point from north to south.
b)
No, because they point from north to south (they're supposed to go the other way).
c)
Yes, because the North pole is on the left in all pictures.
d)
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
21.
The pole of a compass which points towards the Earth's south geographic pole is a
a)
magnetic north pole
b)
magnetic south pole
c)
positive charge pole
d)
magnetic barber pole
22.
The earth's magnetic field at the magnetic equator is approximately
a)
104 T
b)
1/2 T
c)
10-4 T
d)
10-8 T
23.
If a ferromagnet is placed in an external magnetic field, the net magnetic field of its domains becomes
a)
zero
b)
smaller
c)
larger
24.
Why does each electron in an atom behave like a tiny magnet?
a)
The spinning of an electron produces a magnetic field.
b)
The spinning of an proton produces a magnetic field.
25.
Why do some atoms have strong magnetic properties?
a)
Some atoms contain electrons that are not paired.
b)
Some atoms contain protons that are not paired.
c)
Some atoms contain neutrons that are not paired.
26.
Magnetic domains are a grouping of atoms that have their magnetic fields lined up in DIFFERENT directions.
a)
True
b)
False
27.
An entire magnetic domain acts like a bar magnet with a north and south pole.
a)
True
b)
False
28.
In a magnetized material, most of the domains are arranged in the same direction. In a material that is not magnetized, the domains point in _________ directions.
a)
same
b)
random
29.
A ferromagnetic material is a material that shows ________________ magnetic properties.
a)
weak
b)
cold
c)
strong
d)
fast
30.
Today, the most commonly used magnets are made from a material called _____________.
a)
iron
b)
ferrite
c)
steel
d)
magnetite
31.
A magnet can be created by placing the unmagnetized material in a strong magnetic field or by rubbing it in one direction with one pole of a strong magnet.
a)
True
b)
False
32.
A magnetic field causes some domains of the paper clip to line up in the same direction as the _____________ in the magnet.
a)
fields
b)
poles
c)
force
d)
domains
33.
A temporary magnet is a magnet made from a material that easily ____________ its magnetism.
a)
gains
b)
energizes
c)
loses
d)
uses
34.
A magnet made of material that keeps its magnetism is called ________________ magnet.
a)
permanent
b)
temporary
c)
bar
d)
horseshoe
35.
If permanent magnet is dropped its domains could be knocked out of alignment, which would make it become
a)
stronger
b)
unmagnetized
c)
bipolar
d)
a lodestone
36.
Above a certain temperature a ferromagnetic material loses it magnetic properties.
a)
True
b)
False
37.
If you break a magnetic into four pieces, each piece _____________ its magnetic properties.
a)
retains
b)
loses
38.
The shorter pieces still have strong ends with poles because the ____________ in the two halves will still be lined up in the same way.
a)
poles
b)
magnetic field lines
c)
domains
d)
none of the above
39.
Which one of these is a natural magnet that comes from the Earth?
a)
diamond
b)
bar magnet
c)
coal
d)
lodestone
40.
When magnet domains line up, the metal becomes what?
a)
magnetized
b)
unmagnitized
41.
Which material is paramagnetic?
a)
silver
b)
iron
c)
cobalt
d)
nickel
42.
The strength of a magnet depends on three factors. Which one is not a factor?
a)
size
b)
shape
c)
material
d)
color
43.
What does the following represent?
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙⊙
a)
A crowd with binoculars
b)
A bunch of coaxial cables
c)
Uniform magnetic field directed into the screen away from you
d)
Uniform magnetic field directed out of your screen at you
44.
What does the following represent?
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
a)
Multiplied by a billion
b)
A piece of modern art
c)
Uniform magnetic field directed into the screen away from you
d)
Uniform magnetic field directed out of your screen at you
45.
A tesla in not equal to
a)
104 guass
b)
1 weber/m2
c)
1 weber⋅m2
d)
1 N/A⋅m
46.
Which of the following will produce a magnetic field?
a)
A magnet
b)
The Earth
c)
An electric charge at rest
d)
A moving electric charge
e)
An electric current
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