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**Unformatted text preview: **A different review A review of the following topics by working on problems 1. Electric charge, potential, force, field and flux. Coulomb's Law Gauss’s Law. 2. Capacitance and resistance. Ohm’s Law. 3. Circuits. Kirchhoff’s Rules. Electric field of a dipole Calculate the electric field of a point on the x and y axis, far away from an electric dipole. x x P Formula to use: 2 ˆ e e o q k q r = = F E r a a For a point on x: ( ) a + = + 2 e q E k x ( ) a-- =- 2 e q E k x ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) a a a a a a a a-2x2a a a-4a +-- = + = + +- =- +- -- + =- = +- +- =- = ∵ ∵ g 2 2 2 2 2 2 2 2 2 2 2 2 2 3 1 1 ( )( ) x e e x e e e e q q E E E k k x x E k q x x x x k q x y x y x y x x k q x x q k x Calculate the electric field of a point on the x and y axis, far away from an electric dipole. x x P For a point on y, the field y components cancel. ( ) a a a a a a a = = + + = + = ∵ g 3 2 2 2 2 2 2 2 3 2 cos cos 2 2 x e e e q E k θ θ y y q k y q k y y Electric field of a charged rod Calculate the electric field at the origin O of the coordinator system, generated by an evenly charged rod with total charge +...

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