lecture4 - Field Lines Electric Field Lines Motion of...

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Field Lines •Electric Field Lines •Motion of charged particles Text 23.6, 23.7 Practice: •Chapter 23, problems 39, 41, 45, 47 Electric Field Lines Electric Field Lines Electric field lines are a way of visualising the field. Rules for Drawing: 1) Lines start on (+) charges, end on (-) charges 2) (# of lines) charge 3) Lines never cross Interpreting the picture: •i s parallel to the field line at each point. E r ) area unit lines of number ( E r
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Point Charge + Area A, E r 2 Point Charges 2 Point Charges -2Q +Q Note: • number of lines is twice as many on -2Q
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Quiz: Quiz: +q q Which way will the dipole start to move in the electric field? A) up B) down C) left D) right E) nowhere – there is no net force. Parallel Charged Plates Parallel Charged Plates
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lecture4 - Field Lines Electric Field Lines Motion of...

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