Magnets & Electromagnets

Which of the following devices uses magnets?

• Transformer

• Power Line

• Pneumatic Pump

• Coffee Maker

Which of the following does every magnet have?

• North Pole

• South Pole

• Magnetic Field

• Electric Field

What is a magnetic field?

• Area of space where magnetic force acts

• The density of air particles in a given space

• The gravitational force between two objects

• The flow of electric current through a conductor

Where is the magnetic field the strongest?

• North & South Poles

• North Pole only

• South Pole only

• equally strong around the magnet

What happens if you put two north poles together?

• they attract

• they repel

• nothing happens

What happens if you put two south poles together?

• they attract

• they repel

• nothing happens

What happens if you put a north and a south pole together?

• they attract

• they repel

• nothing happens

Which of the following metals are attracted to magnets?

• Iron

• Nickel

• Cobalt

• Copper

What does ferromagnetic mean?

• Made of Iron

• Unpaired electrons create domains

• All electrons are paired

• Able to attract metal

TRUE OR FALSE: unpaired electrons are the source of magnetism

• TRUE

• FALSE