题目
题目

ENGR-217:201,202,203,204,501,502,505,506,515,516,521,522,523,524,525,526,535,536,PHYS-217:203,204,501,502,503,531,532,533 Final Exam

简答题

If the potential due to a point charge is 709 V at a distance of 11.8 m, what is the magnitude of the charge? Use a value of 9.00x109 N.m2/C2 for Coulomb's constant, k.  Write your answer in the units of micro-coulomb ( 𝜇 𝐶 ) to the third decimal place, e.g. 1.263 Do not include units in your answer; just write the numerical value.       

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标准答案
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思路分析
Let's parse the key givens and apply the relation between electric potential and a point charge. The potential at distance r from a point charge q is V = k q / r, where k is Coulomb's constant. We ......Login to view full explanation

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The charges q1 = 1.7 ´ 10–5 C, q2 = –1.9 ´ 10–4 C, and q3 = –3.7 ´ 10–4 C, are placed at the corners of the triangle shown below with a = 3 m, b = 3 m.  What is the absolute value of the potential at the location of the point charge q1? Use a value of 9 ´ 109 N.m2/C2 for Coulomb's constant, k.  Write your answer in the units of mega-volt (MV) to the nearest third decimal place, e.g. 6.327 Do not include units in your answer; just write the numerical value.  Please note: 1 MV = 106 V

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