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Unformatted text preview: and the vector to the charge location, the other charge gives a negative ycomponent with magnitude (9 10 9 )(2 106 ) (2) 2 1 . 6 2 3600 (6). Correct answer is D The force is just (9 10 9 )(2 106 )(16 ) (1 . 6) 2 . 007 (7). Correct answer is E This is the Feld pattern for an electric dipole; the two charges are equal and have opposite signs and there are Feld lines (and hence nonzero Feld values) at the two points. Hence the answer is E. 2 (8). Correct answer is A By Gauss law, there must be a total of 300 nC spread around the inner surface; the charge density is then this charge, divided by the surface area of 4 ( . 8) 2 . (9). Correct answer is D The Feld is always zero inside a conductor (10). Correct answer is C The total charge interior to r= 1.5 is 200nC. The Feld is therefore (9 10 9 )( 200 109 ) (1 . 5) 2 800...
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This note was uploaded on 10/16/2011 for the course PHYS 1B taught by Professor Briankeating during the Winter '07 term at UCSD.
 Winter '07
 BRIANKEATING
 Charge

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