Electric Current and Electrical Energy

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Presentation transcript:

Electric Current and Electrical Energy Chapter 14, Section 2 http://news-poland.com/result/news/id/1626

Electric current is the rate at which charges pass a given point. I’m “charging“ toward the finish line ! http://footage.shutterstock.com/clip-885589-stock-footage-man-running-d-render-with-alpha-channel.html http://www.prlog.org/11759967-trilateral-closes-fund-1-and-prepares-fund-2.html

An electric current can be made when there is a potential difference between two points.

As voltage, or potential difference increases, current increases. http://www.timmestein.nl/index.php?page=Tube-amplifier

An object’s resistance varies depending on the objects: material length thickness temperature As resistance increases, current decreases.

Cells and batteries convert chemical energy or radiant energy into electrical energy. http://www.milehighautomation.com/home-automation-blog/hai/battery/

Example: This cell uses the juice of [an orange] as an electrolyte and uses strips of zinc and copper as electrodes. (page 429) http://www.newlaunches.com/archives/fruit_powered_digital_clock.php

Thermocouples and photocells are devices used to generate electrical energy from heat and light.