TRH Magnetic Fields

Figure 1 shows a train using magnetic levitation to float above the tracks and avoid friction. What is the main advantage of using magnetic levitation for trains?

• Increased friction

• Reduced speed

• Greatly reduced friction

• Increased weight

What is a magnetic field?

• A region of space around a magnet that causes a magnetic force on magnetic objects

• A type of visible light

• A type of sound wave

• A region of space with no force

Which direction do magnetic field lines point outside a magnet?

• From the south pole to the north pole

• From the north pole to the south pole

• In a circular motion

• They do not have a direction

Magnetic field lines never cross one another.

• True

• False

Magnetic field lines are closer together where the magnetic field is ________.

• stronger

• weaker

• absent

• changing

A compass can be used to map the direction of the field lines around a magnet.

• True

• False

When the north pole of a magnet is brought near the south pole of another magnet, what happens?

• The two magnets attract each other.

• The two magnets repel each other.

• Both magnets lose their magnetism.

• Nothing happens between the magnets.

What do the iron filings show around the magnets?

• The color of the magnetic field

• The direction of the magnetic field lines

• The strength of the magnet

• The temperature of the magnet

When two like magnetic poles (north and north or south and south) are brought close to one another, what happens?

• They attract each other

• They repel each other

• Nothing happens

• They combine to form a new magnet

How would moving the magnetic north pole of Earth to a point on the equator change navigation using a compass?

• The compass needle would point east or west instead of north.

• The compass would stop working entirely.

• The compass needle would still point north, but with less accuracy.

• The compass needle would point toward the equator instead of the geographic north.