Electromagnets Movie Review

What is the construction of an electromagnet?

• A conductive wire wrapped around a piece of glass

• A conductive wire wrapped around a piece of plastic

• A conductive wire wrapped around a piece of iron

• A conductive wire wrapped around a piece of wood

What happens when a current is introduced to the coiled wire of an electromagnet?

• It creates a gravitational field

• It creates a magnetic field

• It creates an electric field

• It creates a heat field

What does the magnetic field created by the current do to the iron metal in an electromagnet?

• It demagnetizes the iron metal

• It repels the iron metal

• It magnetizes the iron metal

• It attracts the iron metal

How is an electromagnet similar to a magnet?

• It has two poles

• It has no poles

• It has only one pole

• It has three poles

What happens to the magnetism of an electromagnet once the current is removed?

• It stops working

• It becomes weaker

• It becomes permanent

• It becomes stronger

What is an example of the use of an electromagnet?

• A fan

• A light bulb

• A toaster

• An electric bell

What do like poles of an electromagnet do?

• They repel each other

• They create a magnetic field

• They attract each other

• They have no effect

What do opposite poles of an electromagnet do?

• They have no effect

• They repel each other

• They create a magnetic field

• They attract each other

What material is usually used to make the conductive wire of an electromagnet?

• Aluminum

• Copper

• Silver

• Gold

What metal is usually magnetized by the magnetic field of an electromagnet?

• Copper

• Silver

• Aluminum

• Iron