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The Electric Field. W1 D3 More on Chapter 14. New Groups are posted on our website. The Electric Field – W1D3. No QUIZ today. First quiz next Friday CLICKERS: MONDAY START Last Time Coulombs' Law Vector Notation: < a,b,c > Superposition Symmetry

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## The Electric Field

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**The Electric Field**W1 D3 More on Chapter 14 New Groups are posted on our website.**The Electric Field – W1D3**• No QUIZ today. First quiz next Friday • CLICKERS: MONDAY START • Last Time • Coulombs' Law • Vector Notation: <a,b,c> • Superposition • Symmetry • Today – The concept of the Electric Field • Possibly some discussion about the electric dipole • Next Major Topic: Charge and Matter • Note: There is a NEW WebAssign that will appear sometime today. Topic: E-Field**In the figure, what are the horizontal and vertical**components of the resultant electrostatic force on the charge in the lower left corner of the square if q = 1.5 x 10-7 C and a = 4.0 cm? (Assume the positive directions are upward and to the right.) y 2 3 r2 r3 1 x r1 Note that r goes from the origin to the point where we are computing the force. For our example, r=0.**note for your edification**let’s do it!**discussion**A proton is placed a distance d above a table and is then released. Describe its motion. The room is in a vacuum. “wt_?” d d Observed**the e field= F/Q**1 1 DISCUSSION Is the field REAL??

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