20240131wed-lm - Magnetism

What is the primary cause of magnetism at the atomic level?

• Movement of protons

• Alignment of neutrons

• Movement of electrons

• Vibration of atoms

Which of the following particles' movement is most closely associated with creating a magnetic field around an atom?

• Protons

• Neutrons

• Electrons

• Positrons

What is the term used to describe a region around a magnetic material where the force of magnetism can be detected?

• Magnetic domain

• Magnetic field

• Magnetic wave

• Magnetic resonance

What happens to the magnetic domains in a material when it is magnetized?

• They become randomly oriented

• They shrink in size

• They align in the same direction

• They disappear

Which of the following is not a property of magnetic fields?

• They can exert forces on moving charges

• They are strongest at the poles of a magnet

• They can be shielded by materials like lead

• They always form closed loops

What is the effect called when a magnetic field induces a voltage in a conductor moving through it?

• The piezoelectric effect

• The photoelectric effect

• Electromagnetic induction

• The Hall effect

In the context of magnetism, what is the role of electron spin?

• It causes electrons to move in a circular path

• It contributes to the overall magnetic moment of an atom

• It is irrelevant to magnetism

• It cancels out the magnetic properties of protons

How do ferromagnetic materials differ from non-magnetic materials at the atomic level?

• Ferromagnetic materials have more protons

• Ferromagnetic materials have larger atoms

• Ferromagnetic materials have magnetic domains that can be aligned

• Ferromagnetic materials have electrons that do not spin

What is the name of the theoretical magnetic pole that would exist if Earth's magnetic field were caused by a giant bar magnet?

• Geomagnetic pole

• True magnetic pole

• Magnetic dipole

• Virtual magnetic pole

Which law describes the force between two moving charges?

• Coulomb's law

• Ohm's law

• Ampère's law

• Lorentz force law