The power to learn about AC and DC power lies within everyone. The fifth of seven installments in the Off the Grid unit continues the investigation of the efficiency of a USB charger. Individuals use an inverter that converts DC power to AC and then back to DC.

Concepts

electric circuits, voltage, electric currents

Show More Show Less

Instructional Ideas

• Have the class compare efficiencies for different chargers
  

Classroom Considerations

• Assumes the use of science journals
• Experiment requires a variety of materials and equipment; see resource for complete list

Pros

• Gives some questions for a discussion session
  
• Provides examples of data recording tables
  

Cons

• No student worksheet
  

Common Core

HSN-Q.A.1 HSN-Q.A.2