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Chapter 18: Q17CQ (page 662)
Is the object in Figure a conductor or an insulator? Justify your answer.
The object in the figure is an insulator.
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An eccentric inventor attempts to levitate by first placing a large negative charge on himself and then putting a large positive charge on the ceiling of his workshop. Instead, while attempting to place a large negative charge on himself, his clothes fly off. Explain.
What is grounding? What effect does it have on a charged conductor? On a charged insulator?
The discussion of the electric field between two parallel conducting plates, in this module states that edge effects are less important if the plates are close together. What does close mean? That is, is the actual plate separation crucial, or is the ratio of plate separation to plate area crucial?
Sketch the electric field lines in the vicinity of two opposite charges, where the negative charge is three times greater in magnitude than the positive. (See Figure for a similar situation).
(a) Using the symmetry of the arrangement, determine the direction of the electric field at the center of the square in Figure 18.53, given that\({q_a} = {q_b} = - {\rm{1}}{\rm{.00 }}\mu {\rm{C}}\)and\({q_c} = {q_d} = + {\rm{1}}{\rm{.00 mC}}\). (b) Calculate the magnitude of the electric field at the location of\(q\), given that the square is\(5.00{\rm{ cm}}\)on a side.
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