DC to AC to DC Efficiency

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.

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CCSS: Designed
NGSS: Designed
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
  • Gives some questions for a discussion session
  • Provides examples of data recording tables
  • No student worksheet
Common Core