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Electrical Power

We investigate the concept of electrical power by examining our own energy usage with an energy audit. Multiple electric power equations are derived, exploring the relationship between electric power and Ohm's law.

Unit 5 Segment I: Electric Power We investigate the concept of electrical power by examining our own energy usage with an energy audit. Multiple electric power equations are derived, exploring the relationship between electric power and Ohm's law.

Premiere Date: August 2, 2018 | Runtime: 00:08:09

Support Materials

Learning Objectives

-Define electrical power as the electrical work done per unit time.

-Calculate electrical power with equations derived using Ohm’s Law.

-Connect the concept of electrical power to the real world by performing an energy audit.

Toolkit

Note-Taking Guide and Questions to Consider
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Practice Problems
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How Much Power Do You Use? Lab
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Vocabulary

efficiency - ratio of the total energy output divided by the energy input into a device.

electrical power (P) - the electrical work done per unit time; SI unit is the watt (W).

electrical work (W) - the work done on a charged particle by an electric field.

Georgia Standards of Excellence

SP5
Obtain, evaluate, and communicate information about electrical and magnetic force interactions.
d
Plan and carry out an investigation of the relationship between voltage, current, and power for direct current circuits. (Clarification statement: Application of Ohm’s Law to different circuit configurations, not limited to parallel and series, and calculations of equivalent resistance are expected.)

Request Teacher Toolkit

The Physics in Motion teacher toolkit provides instructions and answer keys for study questions, practice problems, labs for all seven units of study.  GPB offers the teacher toolkit at no cost to Georgia educators. It will be available in September 2018. To preorder your teacher toolkit, complete and submit this form to request the teacher toolkit. You only need to submit this form one time to get materials for all seven units of study.