CH 16 HW 4 F2008

# CH 16 HW 4 F2008 - CH 16 HW 4 F2008 11:38 PM WebAssign CH...

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10/30/08 11:38 PM CH 16 HW 4 F2008 Page 1 of 5 http://www.webassign.net/[email protected]/[email protected] CH 16 HW 4 F2008 (Homework) BAKER KRISTINE NICOLE PY 208M, section 004, Fall 2008 Instructor: Laura I. Clarke Web Assign Current Score: 19 out of 29 Due: Friday, September 26, 2008 12:30 PM EDT Description Potential at a location; potential differences in regions with varying fields; potential and field inside an insulator The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. 4/4 points A highly charged piece of metal (with uniform potential throughout) tends to spark at places where the radius of curvature is small, or at places where there are sharp points. The breakdown electric field strength for air is about 3 10 6 V/m. (a) What is the maximum possible potential of a metal sphere of 14 cm radius in air? (That is, what is the potential at the surface of the sphere, relative to infinity?) 420000 4.20e+05 volts (b) What is the maximum possible potential of a metal sphere of only 0.8 mm radius? 2400 2400 volts Solution or Explanation At the surface of the sphere, E = 3e6 V/m. Solve for q, then find V at the surface of the sphere. 2. 8/8 points

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10/30/08 11:38 PM CH 16 HW 4 F2008 Page 2 of 5 http://www.webassign.net/[email protected]/[email protected] Figure 16.70
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CH 16 HW 4 F2008 - CH 16 HW 4 F2008 11:38 PM WebAssign CH...

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