Understanding Magnetism

Which of the following is not a magnetic material?

• steel

• cobalt

• nickel

• silver

What happens if you cut a magnet in half?

• you get two magnets

• you get monopoles

• it looses its magnetism

Which one of the following is a naturally occurring magnet?

• steel

• iron

• magnetite

Which of the figures below correctly show the

the direction of the magnetic field lines around a

permanent magnet?

• 
• 
• 

The Earth behaves like a huge magnet. The Earth’s geographic north poles are close to its

• magnetic north pole.

• magnetic south pole.

• Earth is not having any magnetic field

When a magnet is allowed to swing freely, it comes to rest aligned in an east-west direction.

• true

• false

Following are the properties of magnetic field lines

• they enter from the south and exit from the north pole

• they start at north and end at the south pole

• they form closed loops

• they leave from the north pole and enter from the south pole

• The direction of a magnetic field line is the direction in which the north pole of the compass points when placed in a magnetic field.

What is the unit of magnetic field strength?

• B

• T

• N

• T/m²

The number of magnetic field lines passing through an area is called

• magnetic field

• magnetic flux

Magnetic flux is least concentrated at the magnetic poles, where the magnetic field strength is the highest.

• true

• false