253-hwk-25b

253-hwk-25b - HPHY 253 Homework 25b The Electric Potential...

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Unformatted text preview: HPHY 253 Homework 25b The Electric Potential: The Field-Potential Relationship Dr. A. E. Bak Name 1. Serway & Jewett Problem 25 : 31 . Over a certain region of space, the electric potential is given by V = 5 x & 3 x 2 y + 2 yz 2 , where all quantities here are measured in the appropriate SI units. Determine the rectangular components of the electric ¡eld over this region. What is the magnitude of the ¡eld at the point (1 ; ; & 2) ? 2. Serway & Jewett 25 : 39 . A spherical conductor has a radius of 14 : cm and charge of +26 : & C . Calculate the electric ¡eld and electric potential at distances of ( a ) 10 : cm ; ( b ) 20 : cm ; ( c ) 14 : cm with respect to the sphere¢s center. 3. From Serway & Jewett Problem 25 : 48 . In fair weather, the electric ¡eld at a particular location in the air immediately above Earth¢s surface is 120 N= C , straight down. (a) What is the surface charge density on the ground? Is it positive or negative?...
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