WorksheetsMagnets and Magnetic Field Lines
Total questions: 25
Worksheet time: 1hrs 19mins
If you hold two magnets a short distance apart and let go, which of the following is a possible result? CHOOSE ALL THAT APPLY!
they will snap together
they will be pushed apart
they will remain motionless
they will become an electric circuit
Which of the following statements is FALSE?
All metals are magnetic in nature.
Any wire that carries an electrical current will produce a magnetic field and will deflect the needle of a compass.
The force of magnetism is caused by moving electrical charges.
In an electromagnet, electrical current moving through a wire coil produces a powerful magnetic field.
Most of the magnets we encounter in our daily lives contain:
iron atoms.
carbon atoms.
the element copper.
electric current.
In iron and other ferromagnetic materials, the magnetic field produced by one atom influences the motion of electrons in neighboring atoms until they are spinning in sync. True or False?
True
False
Explain why the object on the left is not magnetized while the one on the right is magnetized.
The non-magnetized object on the left has domains with magnetic fields pointing in all directions, while the magnetized object on the right has domains with the magnetic fields all pointing in the same direction.
The non-magnetized object on the left must be made out of a material other than iron, while the magnetized object on the right must be made out of iron.
The non-magnetized object on the left has to be plastic, while the magnetized object on the right has to be metal.
The non-magnetized object on the left is an electromagnet with the electric current turned off, while the magnetized object on the right is an electromagnet with the electric current turned on.
Which of the following are true statements? CHOOSE ALL THAT ARE TRUE!
All magnets contain a north pole and a south pole.
The north pole of a magnet is the end that tends to point toward the North Pole of Earth.
The south pole tends to point towards the South Pole of Earth.
North poles of magnets are attracted to south poles of other magnets and vice versa.
If the south pole of one magnet is placed near the north pole of another, the field lines join the poles and the two magnets are pulled together. True or False?
True
False
Water is repelled by very strong magnets.
True
False
Which of the following elements are ferromagnetic?
iron, nickel, and cobalt
iron, aluminum, and steel
iron, copper, and gold
platinum, lead, and aluminum
Which of the following IS NOT a depiction of magnetic field lines?
Which of the following is created when charged objects in electric fields start to move?
a magnetic field
a counter-current
an anti-flux capacitor
a high Ohm resistor
The magnetic behavior of any everyday object is influenced by effects at four different levels. Which of these is at the highest level?
domains
particles
atoms
crystals
Which of the following statements is most closely related to "intrinsic magnetic moment"?
Particles with electric charge are tiny magnets.
Neutral atoms have equal numbers of protons and electrons.
The voltage in an electrical circuit is equal to the current in the circuit multiplied to the resistance in the circuit.
The Earth is a giant magnet.
The nucleus of the atom has a great effect on the magnetism of the atom as a whole. True or False?
True
False
Do the atomic magnets we call "orbital magnetic fields" contribute to the magnetic field of an atom? Why or why not?
No, because the electrons in any filled orbital shell zoom equally in all directions and so the currents they generate cancel out and generate no magnetic field.
No, because there are normally more neutrons than protons in an atomic nucleus.
Yes, because there are equal numbers of positive and negative charges in a neutral atom.
Yes, but only if there are an even number of electrons in an atom's electron cloud.
Atoms near the side of any of the major blocks of the Periodic Table, which have full (or nearly full) outer electron shells, aren't very magnetic. Atoms in the MIDDLE of the blocks have half-full outer electron shells and are magnetic. Is this statement true?
Yes, it is true.
No, it is false.
The first sentence is true, while the second sentence is false.
The first sentence is false, while the second sentence is true.
What do we called a material that is made of magnetic atoms and is magnetic as a substance? Give an example.
We call it a ferromagnetic. Iron is an example.
We call it a dipole. Aluminum is an example.
We call it an electromagnetic. Copper is an example.
We call it an electric circuit. Lead is an example.
Even in a magnetic material where the magnetic fields of atoms line up together, it's possible that one chunk of the material will have all its atoms lined up pointing one way, and another chunk will have all its atoms pointing another way, and so on. What do we call these “chunks”?
domains
families
classes
kingdoms
Iron is the only substance that is always magnetic.
True
False
Human beings can create magnets out of materials that are not magnetic.
True
False
This illustration depicts:
an electric charge.
a magnetic field.
the influence of an electron.
a helium nucleus
The presence and strength of a magnetic field is denoted by:
magnetic flux lines.
magnitude of voltage.
speed of current.
number of electrons.
A moving charge always has:
both a magnetic and an electric field.
a magnetic field only.
an electric field only.
a positive charge.
Magnetic fields are created whenever there is:
a flow of electric current.
two unequal changes.
two neutrons in close proximity.
a battery present.
In an electromagnetic field the directions in which the electric and magnetic field move are ________________ to each other.
perpendicular
parallel
opposite
equal
