Magnetism IGCSE

Which of these is not a magnetic material?

• aluminium

• steel

• nickel

• iron

Which of the above diagrams shows the magnetic field lines around the north pole of a magnet?

• A

• B

• C

• D

Some magnets are easily magnetised when placed in a magnetic field, and then quickly lose their magnetism once the field is removed. These materials are used in electromagnets, and are called...

• soft magnetic materials

• hard magnetic materials

• temporary magnets

• partial magnets

Which diagram shows the poles of the magnets?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

An electromagnet with a soft iron core is connected to a battery and an open switch. The soft iron core is just above some small soft iron nails.

• A

• B

• C

• D

Tags

NGSS.MS-PS2-5

A student wishes to make a permanent magnet. She has an iron rod and a steel rod. Which rod should she use to make the permanent magnet, and is this rod a hard magnetic material or a soft magnetic material?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-3

What do the lines around this magnet represent?

• North Pole

• South Pole

• Magnetic Declination

• Magnetic Field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If the North Pole of a permanent magnet is placed next to a compass as seen in the picture, which direction will the needle move?

• Clockwise (to the right)

• Anti-clockwise (to the left)

• It will not move
• Need more information

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

An electromagnet is used to separate magnetic metals from non-magnetic metals.

Why is steel not suitable as the core of the electromagnet?

• It forms a permanent magnet

• It has a high density

• It has a high thermal capacity

• It is a good conductor of electricity

Tags

NGSS.HS-PS3-5