Chapter 18 Magnetism

The north pole of one magnet will be attracted to

• another north pole.

• a south pole.

• the middle of a magnet.

• All of the above

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Magnetic force

• is strongest near a magnet's poles.

• is a field force.

• acts at a distance.

• All of the above

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Magnetic fields exist

• near a magnet.

• farther away from a magnet.

• within a magnet.

• All of the above

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In a magnetized substance, the domains

• are randomly distributed.

• line up more uniformly in one direction.

• cancel each other.

• can never be reoriented.

When a charge moves in the same direction as the magnetic field lines, the magnetic force is

• zero.

• a maximum.

• equal to the magnetic force when it moves perpendicular to the magnetic field lines.

• None of the above

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When a wire is moving parallel to a magnetic field,

• no current is induced in the wire.

• maximum current is induced in the wire.

• the same current is induced as if it were perpendicular to the field.

• an alternating current is induced.

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Which type of magnet can be easily magnetized and demagnetized?

• permanent

• natural

• hard

• soft

The north poles of two different magnets will _____ one another.

• attract

• repel

• cancel

• None of the above

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Magnetic field lines always form

• straight lines.

• intersecting lines.

• ellipses.

• closed loops.

A magnet on a pivot that can rotate freely is called a

• pole.

• compass.

• hard magnet.

• field line.

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