Magnetism Assignment Quiz

What is the polarity of the Earth's north magnetic pole?

• North polarity

• South polarity

• Neutral polarity

• Bipolar

What were early natural magnets called?

• Ironstones

• Lodestones

• Magnetites

• Ferrites

If the south pole of one magnet is brought close to the south pole of another magnet, what will happen?

• They will attract each other

• They will repel each other

• They will remain neutral

• They will align side by side

How can you determine the polarity of an electromagnet when the direction of current flow is known?

• Using the left-hand rule

• Using the right-hand rule

• Measuring the voltage

• Observing the magnetic field color

What is Flux Density?

• Measure of a material’s ability to become magnetized

• Resistance to magnetism

• Measure of the strength of magnetic fields

• Point where magnetic strength increases

What is Permeability?

• Measure of a material’s ability to become magnetized

• Resistance to magnetism

• Measure of the strength of magnetic fields

• Amount of magnetism left in a material

What is Reluctance?

• Measure of a material’s ability to become magnetized

• Resistance to magnetism

• Measure of the strength of magnetic fields

• Point where magnetic strength increases

What is Saturation?

• Measure of a material’s ability to become magnetized

• Resistance to magnetism

• Measure of the strength of magnetic fields

• Point where magnetic strength increases to its maximum

What is Coercive Force?

• Measure of a material’s ability to retain magnetism

• Resistance to magnetism

• Measure of the strength of magnetic fields

• Amount of magnetism left in a material

What is Residual Magnetism?

• Measure of a material’s ability to become magnetized

• Resistance to magnetism

• Amount of magnetism left in a material after the magnetizing force has stopped

• Point where magnetic strength increases