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# What is the electric field at the outer surface of

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Unformatted text preview: conductor? The charge on the outer surface cannot know where the cavity charge is located because the electric field in the metal is zero. This means that charge on the outer surface is uniformly distributed and the electric field outside looks like the field of a point charge of 3 microcoulombs. A) B) C) D) E) 3.1x103 N/C 0 N/C E varies with position on the outer surface 5.2x103 N/C 6.8x103 N/C 10. Two point charges are arranged as shown. In which region could a third charge -5 C be placed so that the net electrostatic force on it is zero? A) B) C) D) E) I only I and II only III only I and III only II only The two charges have opposite sign, so in region II they will both create a force in the same direction. In region I and III they will create force in opposite directions. However, the charge on the left is smaller than the charge on the right. The third charge must be placed closer to the left charge than the right charge to compensate. This is only possible in region I. Version 1 Page 7 For the e...
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## This test prep was uploaded on 03/22/2014 for the course PHYSICS 240 taught by Professor Davewinn during the Spring '08 term at University of Michigan.

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