The Source of Electrons Lighting an Incandescent Ac Light Bulb

question 33

Multiple Choice

The source of electrons lighting an incandescent ac light bulb is

• A)the power company.
• B)electrical outlet.
• C)atoms in the light bulb filament.
• D)the wire leading to the lamp.
• E)the source voltage.

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Definitions:

Chordate Group

A large group of animals that, at some stage in their development, possess a notochord, dorsal nerve cord, pharyngeal slits, and a post-anal tail.

Bony Fishes

Fish that have skeletons primarily composed of bone tissue, as opposed to cartilaginous fishes; this group includes the vast majority of current fish species.

Placoderms

A group of extinct jawed fishes.

Extinct

The state in which a species no longer exists anywhere on Earth, often due to environmental changes, predation, or human activities.