28. The electric field E just outside the surface of a charged conductor is (A) directed perpendicular to the surface (B) directed parallel to the surface (C) zero (D) infinite
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not on its size or shape. 5) Under electrostatic conditions, the electric field just outside the surface of any charged conductor A) is always parallel to the surface. B) is always zero because the electric field is zero inside conductors. C) is always perpendicular to the surface of the conductor.
Suman K.
To understand the behavior of the electric field at the surface of a conductor and its relationship to surface charge on the conductor, a conductor is placed in an external electrostatic field. The external field is uniform before the conductor is placed within it. The conductor is completely isolated from any source of current or charge. PART A) Which of the following describes the electric field inside this conductor? a) It is in the same direction as the original external field. b) It is in the opposite direction from that of the original external field. c) It has a direction determined entirely by the charge on its surface. d) It is always zero. PART B) The charge density inside the conductor is: a) 0 b) non-zero, but uniform c) non-zero, non-uniform d) infinite
Adi S.
2) A positive charge q is fired through a small hole in the positive plate of a capacitor. a) Does q speed up or slow down inside the capacitor? b) As q moves from the positively charged plate towards the negatively charged plate, does it move into a region of higher potential or lower potential? 3) Under electrostatic conditions, the electric field just outside the surface of any charged conductor A) is always parallel to the surface. B) is always zero because the electric field is zero inside conductors. C) is always perpendicular to the surface of the conductor. D) is perpendicular to the surface of the conductor only if it is a sphere, a cylinder, or a flat sheet. E) can have nonzero components perpendicular to and parallel to the surface of the conductor.
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