RAD 236 Chapter 5 Exam QUESTIONS AND
ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTIONS
_________ is the property possessed by certain materials to attract or repel similar
materials, and it is a fundamental property of some materials. -ANSWER-magnetism
Any charged particle in motion creates a _______ _____. -ANSWER-magnetic field
The magnetic field of a charged particle such as an electron in motion is
______________ to the motion of that particle. -ANSWER-perpendicular
When a charged particle (electron) moves in a circular motion around the nucleus, the
_____________ magnetic field moves with the electron in a ______ ____. -ANSWER-
perpendicular, closed loop
The imaginary lines of a magnetic field are always ______ _____. -ANSWER-closed
loops
A spinning charged particle (electron) will induce a magnetic field along the axis of the
spin, this is called _______ ____. -ANSWER-electron spin
In non-magnetic materials, the magnetic forces are canceled out because the electrons
exist in pairs that spin in _______ directions. -ANSWER-opposite
The lines of a magnetic field do not start or end as the lines of an electric field do, and
such a field is called _______; it always has a north and a south pole. -ANSWER-
dipolar
The small magnet that is created by the electron orbit is called a _______ ______. -
ANSWER-magnetic dipole
An accumulation of many atomic magnets (dipoles) that are aligned creates a _______
______. -ANSWER-magnetic domain
If all the magnetic domains in an object are aligned, it acts like a magnet. Under normal
circumstances though, magnetic domains are _________ distributed. -ANSWER-
randomly
, Randomly oriented dipoles can align with an external magnetic field; for example if a
ferromagnetic material is brought near a bar magnet it causes the _______ in the bar
magnet to deviate toward the ferromagnetic material. -ANSWER-dipoles
______ ___________ is the ability of a material to attract lines of magnetic field
intensity. -ANSWER-magnetic permeability
What are the three principal types of magnets? -ANSWER-- naturally occurring
magnets.
- artificially induced permanent magnets.
- electromagnets.
Natural magnets are magnets that occur in nature, such as the _____ because it spins
on an axis. ____________ are also a natural magnet that can be produced by lightning
and are found near the Earth's surface. -ANSWER-Earth, lodestones
Artificially induced permanent magnets are made by aligning their magnetic domains in
the field of an ____________, and one example is a compass. -ANSWER-
electromagnet
Permanent magnets can lose their _________ when overheated or broke by force,
which causes the dipoles of the magnetic domains to become randomly distributed. -
ANSWER-magnetism
Electromagnets consist of ____ wrapped around an ____ core. -ANSWER-wire, iron
When an electric current is conducted through the wire, a magnetic field is created. The
intensity of the magnetic field is ______ ____________ to the electric current. -
ANSWER-directly proportional
The iron core in an electromagnet greatly ________ the intensity of the magnetic field. -
ANSWER-increases
Materials that are unaffected by a magnetic field are called __________ and some
examples are ____ and _____. -ANSWER-non-magnetic, wood, glass
Materials that are strongly attracted by a magnet and are often permanently magnetized
by exposure to a magnetic field are called _______________, and some examples are
____, ______, and ______. -ANSWER-ferromagnetic, iron, nickel, cobalt
______ magnets are one of the more useful magnets produced from ferromagnetic
material. -ANSWER-alnico
The degree to which a material can be magnetized is its _______ ___________. -
ANSWER-magnetic susceptibility
Wood has ____ magnetic susceptibility as it does not increase the strength of a
magnetic field when placed in one. Iron has ____ magnetic susceptibility because it
greatly increases the strength of a magnetic field. -ANSWER-low, high
There is no smallest unit of magnetism; dividing a magnet simply creates ______
magnets and so forth. -ANSWER-smaller
The ends of a magnet are called _______ _____ and each magnet has two of them,
which are the _____ and _____ poles (these are analogous to positive and negative
electrostatic charges). -ANSWER-magnetic poles, north, south
As with electric charges, like magnetic poles _____ and unlike magnetic poles _____. -
ANSWER-repel, attract
The imaginary lines of the magnetic field leave the _____ pole of a magnet and return to
the _____ pole of the magnet. -ANSWER-north, south
ANSWERS | 2026 UPDATE | WITH COMPLETE
SOLUTIONS
_________ is the property possessed by certain materials to attract or repel similar
materials, and it is a fundamental property of some materials. -ANSWER-magnetism
Any charged particle in motion creates a _______ _____. -ANSWER-magnetic field
The magnetic field of a charged particle such as an electron in motion is
______________ to the motion of that particle. -ANSWER-perpendicular
When a charged particle (electron) moves in a circular motion around the nucleus, the
_____________ magnetic field moves with the electron in a ______ ____. -ANSWER-
perpendicular, closed loop
The imaginary lines of a magnetic field are always ______ _____. -ANSWER-closed
loops
A spinning charged particle (electron) will induce a magnetic field along the axis of the
spin, this is called _______ ____. -ANSWER-electron spin
In non-magnetic materials, the magnetic forces are canceled out because the electrons
exist in pairs that spin in _______ directions. -ANSWER-opposite
The lines of a magnetic field do not start or end as the lines of an electric field do, and
such a field is called _______; it always has a north and a south pole. -ANSWER-
dipolar
The small magnet that is created by the electron orbit is called a _______ ______. -
ANSWER-magnetic dipole
An accumulation of many atomic magnets (dipoles) that are aligned creates a _______
______. -ANSWER-magnetic domain
If all the magnetic domains in an object are aligned, it acts like a magnet. Under normal
circumstances though, magnetic domains are _________ distributed. -ANSWER-
randomly
, Randomly oriented dipoles can align with an external magnetic field; for example if a
ferromagnetic material is brought near a bar magnet it causes the _______ in the bar
magnet to deviate toward the ferromagnetic material. -ANSWER-dipoles
______ ___________ is the ability of a material to attract lines of magnetic field
intensity. -ANSWER-magnetic permeability
What are the three principal types of magnets? -ANSWER-- naturally occurring
magnets.
- artificially induced permanent magnets.
- electromagnets.
Natural magnets are magnets that occur in nature, such as the _____ because it spins
on an axis. ____________ are also a natural magnet that can be produced by lightning
and are found near the Earth's surface. -ANSWER-Earth, lodestones
Artificially induced permanent magnets are made by aligning their magnetic domains in
the field of an ____________, and one example is a compass. -ANSWER-
electromagnet
Permanent magnets can lose their _________ when overheated or broke by force,
which causes the dipoles of the magnetic domains to become randomly distributed. -
ANSWER-magnetism
Electromagnets consist of ____ wrapped around an ____ core. -ANSWER-wire, iron
When an electric current is conducted through the wire, a magnetic field is created. The
intensity of the magnetic field is ______ ____________ to the electric current. -
ANSWER-directly proportional
The iron core in an electromagnet greatly ________ the intensity of the magnetic field. -
ANSWER-increases
Materials that are unaffected by a magnetic field are called __________ and some
examples are ____ and _____. -ANSWER-non-magnetic, wood, glass
Materials that are strongly attracted by a magnet and are often permanently magnetized
by exposure to a magnetic field are called _______________, and some examples are
____, ______, and ______. -ANSWER-ferromagnetic, iron, nickel, cobalt
______ magnets are one of the more useful magnets produced from ferromagnetic
material. -ANSWER-alnico
The degree to which a material can be magnetized is its _______ ___________. -
ANSWER-magnetic susceptibility
Wood has ____ magnetic susceptibility as it does not increase the strength of a
magnetic field when placed in one. Iron has ____ magnetic susceptibility because it
greatly increases the strength of a magnetic field. -ANSWER-low, high
There is no smallest unit of magnetism; dividing a magnet simply creates ______
magnets and so forth. -ANSWER-smaller
The ends of a magnet are called _______ _____ and each magnet has two of them,
which are the _____ and _____ poles (these are analogous to positive and negative
electrostatic charges). -ANSWER-magnetic poles, north, south
As with electric charges, like magnetic poles _____ and unlike magnetic poles _____. -
ANSWER-repel, attract
The imaginary lines of the magnetic field leave the _____ pole of a magnet and return to
the _____ pole of the magnet. -ANSWER-north, south
