Unit 8.3 Quiz 3

 We can use ___________ to show the shape of a magnetic field. (Check all that apply.)

• a permanent magnet

• another magnet

• a compass

• iron filings

Which of the following will NOT increase the strength of an electromagnet?

• adding an iron core inside the coils

• adding a bar magnet on the side

• adding batteries together

• winding more wire coils

A bar magnet is suspended from a string free to rotate away from all magnetic material and other magnets. When the bar magnet comes to rest, the north pole of the magnet will be pointing:

• toward Earth’s North Pole.

• directly away from the center of Earth.

• toward the center of Earth.

• toward Earth’s South Pole.

The presence of a magnetic field may be detected by using a:

• light bulb

• compass

• small mass

• stationary charge

Tags

NGSS.MS-PS2-5

Which of the following has NO effect on the strength of the magnetic field around a current-carrying coil of wire?

• The number of turns of wire in the coil.

• The direction of the battery connected to the coil.

• The material of the core placed inside the coil.

• The amount of current flowing through the coil.

Tags

NGSS.MS-PS2-3

When iron is added as a core to a current-carrying solenoid (coil of wire), the magnetic field strength of the solenoid increases because the:

• iron increases the current flowing around the coils of the solenoid.

• iron adds the strength of the Earth’s magnetic field to the solenoid.

• iron’s magnetic domains align with the field due to the current.

• iron is already magnetized.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

What would be the most accurate description of a magnetic pole?

• The part of a magnet that will interact most strongly with a ferromagnetic object.

• The parts of the magnet that are differently colored.

• The part of a magnet that attracts metal objects.

• The ends of a magnet.

Which of the following combinations are ALL ferromagnetic objects (are attracted to a magnet)?

• paper clip, magnetite, hematite, iron oxide

• magnesium, cobalt, iron, aluminum

• copper oxide, paper clip, magnetite, piece of cassette tape

• cobalt, nickel, iron, aluminum

• iron oxide, magnesium, copper, cesium