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Unformatted text preview: Name: __________________________ Date: _____________ 1. Charge is placed on the surface of a 2.7-cm radius isolated conducting sphere. The surface charge density is uniform and has the value 6.9 ! 10 6 C/m 2 . The total charge on the sphere is: A) 5.6 ! 10 10 C B) 2.1 ! 10 8 C C) 4.7 ! 10 8 C D) 6.3 ! 10 8 C E) 9.5 ! 10 3 C 2. Consider Gauss' law: enc E dA q " # $ % & ! ! " . Which of the following is true? A) E ! must be the electric field due to the enclosed charge B) If q enc = 0, then E $ ! everywhere on the Gaussian surface C) If three particles are inside and they have charges of + q , + q , and 2 q , then the integral is zero D) on the surface E ! is everywhere parallel to dA ! E) If a charged particle is placed outside the surface, then it cannot affect E ! at any point on the surface 3. Choose the INCORRECT statement: A) Gauss' law can be derived from Coulomb's law B) Gauss' law states that the net number of lines crossing any closed surface in an outward direction is proportional to the net charge enclosed within the surface...
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- Spring '08