lecture3 - 1 Electric Fields II Electric field produced by...

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Unformatted text preview: 1 Electric Fields II Electric field produced by point charges Continuous charge distributions Text sections 23.4, 23.5 Practice: Chapter 23 , problems 21, 27, 31 Define: q F E r r = is force exerted on by . E r q F r 2 Example Example : Find: Field (vector) at the origin. C q 10 1- = C q 20 2 = 400mm 300mm QUIZ QUIZ C q 10 1- = C q 20 2 = The electric field is also defined as force/charge. For the field we have just calculated, the charge in this denominator should be A) q 1 B) q 2 C) (q 1 + q 2 ) D) None of the above 3 Example: Dipole Example: Dipole An An electric dipole electric dipole is a pair of equal and opposite charges is a pair of equal and opposite charges placed a short distance (2 placed a short distance (2 a in the diagram) apart. in the diagram) apart. Derive an expression for at point B. E r y a a x B : (0,y) A : (x,0)-q +q QUIZ QUIZ y a a B : (0,y)-q +q What will be the direction of the field at B?...
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This note was uploaded on 02/17/2011 for the course PHYSICS 1E03 taught by Professor Jopko during the Spring '08 term at McMaster University.

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lecture3 - 1 Electric Fields II Electric field produced by...

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