Ch15L3: Magnetism

What is a magnet?

• Any object that attracts iron

• pole

• field

• material

The south pole of a magnet will be most strongly attracted to which of the following?

• the north pole of a magnet 4 inches away

• the south pole of a magnet 1 inch away

• the north pole of a magnet 1 inch away

• the south pole of a magnet 4 inches away

When does a magnet produce an electric current in a wire that is near it?

• only when the magnet moves

• only when the wire moves

• when either the magnet or the wire move

• when neither the magnet nor the wire move

Which is NOT a component of an electromagnet?

• a wire coil

• a permanent magnet

• a core of magnetic material

• an electric power supply

Any object that a magnet attracts is a magnetic _________

• pole

• field

• material

The push or pull that a magnet applies to another magnet or to an object made of a magnetic material is a magnetic

• field

• force

• domain

The place on a magnet where the magnet exerts the strongest magnetic force is the magnetic _________________

• pole

• force

• domain

A group of atoms where the magnetic fields of the atoms point in the same direction is ________________

• a magntic force

• an electromagnet

• a magnetic domain

A temporary magnet made with a current-carrying wire coil wrapped around a magnetic core is ____________

• a magnetic field

• an electromagnet

• a permanent magnet

All materials are made of ______________.

• atoms

• iron

• magnetic domains

• magnetic field