S13Phys2BaLec22B

Conductors an isolated conductor that is in static

• Notes
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Conductors An isolated conductor that is in static equilibrium will have some interesting properties: 1) Any excess charge will reside entirely on its surface. 2) The electric field is zero everywhere inside the conducting material. If this part were not true, there would still be charges moving around until it became true. 3) On an irregularly shaped conductor, charge accumulates on sharp points.
Conductors And finally: 4) The electric field just outside of a charged conductor is perpendicular to the conductor’s surface. What would the electric field look like for a large positively charged conducting plane (like a floor)? Straight up, perpendicular to the surface.

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Clicker Question 22B-2 An electron is placed in a uniform electric field at the position marked by the dot. The force on the electron is: A) To the right. B) To the left. C) Up. D) Down. E) Zero.
Clicker Question 22B-3 A charged particle, labeled A, is located at the midpoint between two other charged particles, labeled B and C, as shown below. The sign of the charges on all three particles is the same. When particle A is released, it starts drifting toward B. What can be determined from this behavior? A) The charge on A is larger than the charge on B. B) The charge on A is larger than the charge on C. C) The charge on C is larger than the charge on B. D) The charge on B is larger than the charge on A.

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• Spring '08
• schuller
• Charge, Electric charge

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