Science Section III Test - Magnetism (2025-2026)

How do magnets differ from electric charges in how their poles are named?

• Magnets use positive and negative like electric charges

• Magnets use north and south poles instead of positive and negative

• Magnets have only one type of pole

• Magnets use color codes instead of charges

• Magnets don’t have poles

What happens when the north ends of two magnets are brought close to each other?

• They attract each other strongly.

• They become neutral.

• They repel each other.

• They create electricity.

• They lose their magnetism.

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If two magnets line up pointing in the same direction, what does this mean?

• They repel each other.

• They become neutral.

• They lose their magnetism.

• They create electricity.

• They attract each other.

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You have a bar magnet and you cut it exactly in half. What will happen to the magnetic poles?

• One half will have only a north pole, the other only a south pole.

• One half will lose all magnetism.

• Both halves will have only north poles.

• Both halves will have no poles at all.

• Both halves will become smaller magnets, each with a north and a south pole.

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What is the fundamental unit of magnetism?

• a single magnetic charge like a proton or electron

• a magnetic monopole

• a magnetic dipole

• a magnetic field line

• a magnetic electron

What is a magnetic monopole?

• a particle with both a north and south pole

• a particle with no magnetic poles at all

• a magnetic field line

• a hypothetical particle with only a north pole or only a south pole

• a compass needle

Why is there no equivalent of Coulomb’s law for magnetism?

• because there are no single magnetic charges

• because magnetic fields only act on neutral particles

• because magnetic forces do not exist

• because magnetic fields do not exert forces

• because electric charges are stronger than magnetic charges

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You place a compass near a bar magnet. How will the compass needle behave?

• It will spin randomly.

• It will point away from the magnet.

• It will align with the magnetic field, pointing from the magnet’s north pole toward its south pole.

• It will point perpendicular to the magnetic field lines.

• It will lose its magnetism.

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How do magnetic field lines behave around a bar magnet?

• They start at the north pole and end in empty space.

• They start and end on magnetic monopoles.

• They are straight lines that go outward forever.

• They loop from the north pole back to the south pole continuously.

• They only exist around electrically charged particles.

Why do most objects not show large-scale magnetism even though their atoms are magnetic?

• Their atoms have no magnetic poles.

• Their atomic magnets point in random directions and cancel out.

• Their atoms are made of non-magnetic materials.

• Their atoms are too small to be magnetic.

• Their atoms lose magnetism over time.

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