Magnetism: Magnetic Fields

The video tutorial demonstrates the effect of a bar magnet on iron filings, highlighting the pattern formed by the filings which outline the magnetic fields. It explains that magnetic forces are strongest at the poles but extend throughout the magnet. The tutorial also covers how magnetic lines of force extend from one pole to the other and how unlike poles attract while like poles repel each other.

What do the patterns formed by iron filings around a magnet represent?

• The weight of the magnet

• The magnetic fields

• The temperature of the filings

• The color of the magnet

Where are the magnetic forces of a magnet the strongest?

• At the center of the magnet

• At the poles of the magnet

• Evenly distributed throughout the magnet

• Only at the north pole

What is the line of force in a magnet?

• A line that extends from the north pole to the south pole

• A line that circles around the magnet

• A line that is only visible under a microscope

• A line that changes color with temperature

What happens when two unlike magnetic poles interact?

• They attract each other

• They lose their magnetism

• They repel each other

• They become neutral

How do like magnetic poles behave when they interact?

• They become stronger

• They repel each other

• They attract each other

• They change color