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WorksheetsMagnetism
Total questions: 46
Worksheet time: 23mins
Name
Class
Date
1.
The source of all magnetism is
a)
moving electric charges
b)
ferromagnetic materials
c)
tiny domains of aligned atoms
d)
tiny pieces of iron
2.
Moving electric charges will interact with
a)
an electric field
b)
a magnetic field
c)
both A and B
d)
none of the above
3.
An iron rod becomes magnetic when
a)
positive charges line up on one side and negative charges on the other side
b)
positive ions gather at one end and negative ions at the other end
c)
its electrons stop moving and point in the same direction
d)
the net spins of its electrons point in the same direction
4.
Surrounding every moving electron is
a)
an electric field
b)
a magnetic field
c)
an electric and magnetic field
d)
none of the above
5.
Magnetism is produced by the motion of electrons as they
a)
move around the nucleus
b)
spin on their axes
c)
both A and B
d)
neither A or B
6.
If the north pole of one magnet is brought near the south pole of another magnet, the poles will
a)
repel
b)
attract
c)
not interact
d)
How am I supposed to know that!
7.
If you break a bar magnet in half, each half
a)
becomes a bar magnet with two poles
b)
becomes unmagnetized
c)
contains one magnetic pole
d)
says 'hey man, what did I ever do to you?!'
8.
If you put a small compass in a magnetic field, the compass will
a)
swing randomly
b)
line up in a direction parallel to the magnetic field lines
c)
line up in a direction perpendicular to the magnetic field lines
d)
seek electrical charge concentrations
9.
Magnetic field strength is
a)
strongest close to a magnet
b)
constant everywhere
c)
strongest far from a magnet
10.
Magnetic fields are produced by
a)
moving particles on earth
b)
charges at rest
c)
moving particles
d)
moving charged particles
11.
Magnetic domains are
a)
regions that may or may not be magnetized.
b)
clusters of atoms randomly aligned
c)
regions of atoms magnetically aligned
d)
blocks of material
12.
Permanent magnets can be made by
a)
placing a piece of iron near a strong electromagnet
b)
placing a piece of iron in a strong magnetic field
c)
stroking material containing iron with a magnet
d)
all of the above
13.
The reason a magnet can attract an unmagnetized nail is that
a)
nails really are magnetized (fooled you suckerz!)
b)
nails become permanently magnetized in a magnetic field
c)
nails become temporarily magnetized in a magnetic field
d)
a magnet can attract any metal object
14.
When current passes through a wire, a magnetic field is created around the wire only if the
a)
wire is absolutely straight
b)
wire is in a curved loop
c)
current comes from a batter
d)
a magnetic field is always present around a current carrying wire
15.
In order to make an electromagnet, you need a
a)
battery, nail, and magnet
b)
battery, wire, and nail
c)
magnet, nail, and wire
d)
all of the above
16.
Earth's magnetic field is most likely due to
a)
millions of small magnets buried in Earth
b)
a magnetized solid inner core of Earth
c)
convection currents in the molten part of Earth's interior
d)
rotation of Earth acting on all of Earth's electrons
17.
The discrepancy between the orientation of a compass and true north is known as the
a)
radioactive effect (hulkify!)
b)
magnetic declination
c)
magnetic effect
d)
magnetic discrepancy
18.
The force on an electron moving in a magnetic field will be the largest when its direction
a)
is at an angle other than 90 degrees to the magnetic field direction
b)
is perpendicular to the magnetic field
c)
is the same as the magnetic field
d)
is exatly opposite to the magnetic field (180 degrees)
19.
Magnetic field lines surrounding a magnet are conventionally drawn
a)
from south to north
b)
from north to south
c)
either way
d)
Who knows?!
20.
Magnetic field lines inside of a magnet are conventionally drawn
a)
from north to south
b)
from south to north
c)
either way
d)
MAGNETO WINS ALL!!
21.
Magnetic poles are similar to electric charges in that they both can repel and attract one another.
a)
true
b)
false
22.
Because magnetism is slightly different from electrostatics, magnetic fields do not exist.
a)
true
b)
false
23.
Just as it is easy to separate electric charges, it is relatively easy to isolate a magnet’s poles.
a)
true
b)
false
c)
maybe...?
24.
A magnetic field is produced by the motion of charged particles.
a)
true
b)
false
25.
Spinning electrons themselves are small magnets.
a)
true
b)
false
26.
There is a magnetic field around a current-carrying wire.
a)
true
b)
false
c)
maybe...?
27.
A neutron that moves at right angles to a magnetic field experiences a force.
a)
true
b)
false
28.
The magnetic pole in the Northern Hemisphere is located at the geographic North Pole.
a)
true
b)
false
29.
Which magnetic pole is located in the northern hemisphere
a)
Magnetic North Pole
b)
Magnetic South Pole
30.
A current-carrying wire experiences a force when the wire is perpendicular to a magnetic field.
a)
true
b)
false
31.
In order to form an electric circuit, you need to have
a)
wires or conductors to connect everything.
b)
a power source.
c)
a complete path for the current.
d)
all of the above
32.
Electrical resistance is measured in
a)
volts.
b)
amperes.
c)
watts.
d)
ohms.
33.
A closed circuit is a circuit in which charge
a)
can flow.
b)
is prevented from flowing.
34.
As more lamps are put into a series circuit, the overall current in the circuit
a)
stays the same.
b)
increases.
c)
decreases.
35.
As more lamps are put into a parallel circuit, the overall current in the circuit
a)
increases.
b)
stays the same.
c)
decreases.
36.
In order for there to be a flow of charge from one place to another, there must be a
a)
conductor, such as a wire, connecting the two places.
b)
potential difference between the two places.
c)
Both A and B above
37.
An ampere is a
a)
unit of resistance.
b)
unit of current.
c)
type of charge.
d)
current.
38.
The primary reason a bird can perch harmlessly on bare high voltage wires is that
a)
a bird's feet are close together.
b)
a bird has a very large electrical resistance.
c)
there is no potential difference across the bird's feet.
d)
all of the above
39.
Alternating current is made by
a)
alternating current and voltage.
b)
alternating the direction of voltage of the power source.
c)
huge chemical batteries.
d)
none of the above
40.
The frequency of AC current in North America is
a)
120 V.
b)
50 hertz.
c)
30 V.
d)
60 hertz.
41.
Current from a battery is always
a)
AC
b)
DC
42.
Where do the electrons come from that produce heat and light in a light bulb?
a)
the power company
b)
the air
c)
the wall plug
d)
the bulb's wire filament
43.
The direction of electric field lines shows the
a)
direction of the force on a test positive charge.
b)
size of the field.
c)
strength of the field.
d)
all of the above
44.
If two negative charges are held close together and then released, the charges will
a)
accelerate toward each other.
b)
accelerate away from each other.
c)
not move.
d)
move at a constant speed away from each other.
45.
A volt is a unit of
a)
charge.
b)
electric potential.
c)
energy.
d)
work.
46.
Electrical potential energy per charge is electric
a)
force.
b)
power.
c)
potential.
d)
work.
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