Electrostatics and Coulomb’s Law Tuesday, March 24, 2015

Unit 9: Electricity, 3/20  On your warm-up respond to the following: What role does a force have on the transformation of energy? Upcoming dates:  Thursday, 3/26 – open note quiz  Thursday, 4/2 – open note quiz  Thursday, 4/2 – 5SW extra credit due by 4:30  Friday, 4/10 – Electricity test (grade will go on the 6SW)  Friday, 4/10 – End of 5SW

Activity  On the back lab tables you will find a ruler, a coffee filter, and small pieces of paper.  Your task is use the only supplies given and move the paper with the ruler without the ruler touching the table.  When you have completed your task respond the following:  What procedure did you use to move the paper?  What forces could you see? What forces were invisible?

Introduction to Static Electricity  Access the video link on my website for today.  Complete the video note guide while watching the video.  When finished show me your notes and I will record your grade.

Induction/Conduction guiding questions (6 minutes)  What circumstances must be present for conduction to take place?  What type of charge is transferred during the process of conduction ?  Draw the diagram that demonstrates conduction.  What circumstances must be present for induction to take place?  What type of charge is transferred during the process of induction ?  Draw the diagram that demonstrates induction.

Coulomb’s Law guiding questions (6 minutes  Explain the affect the value of the charges and and the distance of the charges has on the electrical force.  Write Coulomb’s equation and label the variables (include units).  How do you convert micro coulomb’s ( μC) to coulombs  What does the value of F electric tell you about the charges attraction/repulsion?  Set up the G and U for example #1.

Article – Shocking idea