Motors and Generators

Unlike poles of a magnet will

• Repel
• Attract

Like poles of a magnet will 

• Repel
• Attract

What is formed when a wire in an electric circuit is wrapped around an iron core producing a magnetic field?

• electromagnet
• generator
• magnet
• electric motor

Generators are devices that convert _____ energy into _____ energy.

• chemical; mechanical
• mechanical; electrical
• electrical; mechanical
• potential; kinetic

Electric motors are devices that convert _____ energy into  _____ energy.

• electrical; mechanical
• mechanical; electrical
• chemical; potential
• mechanical; kinetic

In large generators in power plants, ___________ rotate inside a coil of wire to produce an electric current.

• Wind
• Water
• Magnets
• Circuits

What two forces are required for generators and electric motors to work? 

• magnetism and thermal 
• electricity and thermal 
• electricity and magnetism 
• magnetism and radiant 

What word best fits this definition: A device which converts electrical energy into mechanical energy usually through the rotation of an electromagnet in the field of a stationary magnet.

• armature

• system

• motor

• electromagnet

Which word best fits this definition: The rotating part of a motor.

• system

• brush

• electromagnet

• armature

a motor uses electricity to create magnetic fields

• true

• false