Monday 21 October 2013

Oct. 21 – Discharges

Reminder: there is a quiz on Thursday, Oct. 24!  It will cover all of chapter 11.  Here are the quiz topics:

Handout: Chapter 11 Quiz Topics

Discharges

Learning Goals: Understand how electrical discharges occur.

Success Criteria: You can describe examples of electrical discharges and explain how they occur.

This is the final topic from this week that will be on the quiz: discharges.  When a lot of charges build up, they can jump from one object to another.

Discharges: The rapid transfer of electrons from one object to another.

Examples: being shocked by a doorknob, lightning, tasers, unplugging outlets.





Here are some amazing photos of lightning storms:

Do you think lightning moves up from the Earth to the clouds or down from the clouds to the Earth? The answer is a little of both.  Sometimes lightning even goes from clouds to clouds.

Here are some videos of electric discharges.
WARNING: All of these are incredible dangerous situations!  Always be cautious around electrical power sources.

The movie "Like Mike" makes it look like you get magical powers from being shocked.  In real life, you would probably die.  Again, I repeat, be extremely cautious around electrical power sources!

Next we worked on some questions regarding electrostatic applications.  These questions will help prepare you for the quiz.


Homework: Complete the handout.

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