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

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
Practice Problems
How Much Power Do You Use? Lab

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.)

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