Electromagnet

What is the metal center of an electromagnet called?

• The current
• the wire
• the coil
• the core

What is this?

• magnet
• electromagnet
• series circuit
• parallel circuit

How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole

Like poles on a magnet

• attract
• repel

What is a switch's function in a circuit?

• to make the current hotter or colder
• turn on and off the flow of current
• the pathway that current flows
• to add more power to the circuit

Unlike poles on a magnet

• repel
• attract

An electric motor changes electrical energy to _________ energy. 

• mechanical 
• chemical
• potential
• free

How is an electromagnet different from a permanent magnet?

• An electromagnet’s magnetism can be turned off.
• An electromagnet is smaller and less powerful.
• An electromagnet can be built without using metal.
• An electromagnet does not attract objects containing iron.

A coil that is magnetized only when an electric current flows through it is _____________.

• a battery
• a generator
• a conductor
• an electromagnet