schematic diagrams

Phone Charger Efficiency

Grades:

7-12

Unit:

Lesson Number:

Description:

This is part of the Off the Grid Unit. In this lesson students will explore the concept of efficiency , and how to take data in order to calculate the efficiency of various cell phone or USB charging circuits. They will complete this process by using a...

Energy Content:

Circuitry,

Electrical Energy,

Electronics

More Details Less Details

Learning Goal(s):

1. Students will use multimeters to measure voltage and current in circuits. 2. Students will use collected data and be able to make power calculations from this data. 3. Students will also be able to calculate efficiency from their power calculations. 4. Students will be able to compare efficiencies in order to identify the circuit that is most efficient. 5. Students will be able to make circuits from a diagram and vice versa.

Pedagogy & Practice:

Hands-on Materials

NGSS Science and Engineering Practices:

2: Developing and Using Models,

3: Planning and Carrying Out Investigations,

4: Analyzing and Interpreting Data,

5: Using Mathematics and Computational Thinking,

7: Engaging in Argument from Evidence,

8: Obtaining, Evaluating, and Communicating Information

Author:

Brett McFarland

Relevant NGSS PE: