Current Electricity

What do fuel cells, batteries, and solar cells have in common?

• They all produce static electricity
• They are all sources of direct current
• They are all sources of alternating current
• They can all be used to power automobiles

What can you infer about this source of electricity?

• It is a source of alternating current
• . It is a source of direct current
• . It is a source of static electricity
• . It is a source of electromagnetic radiation

How does alternating current differ from direct current?

• Alternating current produces more voltage than direct current
•  Alternating current always flows in the same direction; the direction of a direct current switches back and forth
• Direct current produces more voltage than alternating current
•  Direct current always flows in the same direction; the direction of an alternating current switches back and forth

How does electricity travel from power plants to your house?

• It travels through the air as electromagnetic waves
• Through a series of generators
• Through a series of many transformers
•  Through transmission wires

What is the function of every generator on Earth?

• Changing wind energy into electrical energy
• Changing heat energy into electrical energy
• Changing mechanical energy into electrical energy
• Changing solar energy into electrical energy