Exam 16: Electric Forces and Fields

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Three point charges are positioned as follows: q1 is at (0.00 m,0.00 m),q2 is at (1.20 m,0.00 m),and q3 is at (1.20 m,1.60 m).If all three charges are negative,into which quadrant is the force on q1 pointing?

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The electric field between two charged conducting plates is

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The electron orbiting the proton in the hydrogen atom is at a distance of 5.3 ×\times 10-9 m.What is the ratio of the electric force to the gravitation force between these particles? (The mass of the proton is 1.67 ×\times 10-27 kg and the mass of the electron is 9.11 ×\times 10-31 kg.)

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Two equal point charges are separated by a distance d.When the separation is reduced to d/4,what happens to the force between the charges?

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An electric dipole is surrounded by a closed surface with the surface nearer to the negative end of the dipole than the positive end.The flux through the surface is

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An electron is fired through a pair of deflection plates,which produce a 2.00 cm long region with an electric field of 4000 N/C perpendicular to the electron's initial velocity.If the initial speed of the electron is 1.00 ×\times 107 m/s,how long does it take to traverse the plates?

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