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 post-class_test_wk_03_Electric Charge, Electric Field, Electric Potential

简答题

How far from a 0.7  point charge does the potential have a value of 165 V?  Use a value of 9.00x109 N.m2/C2 for Coulomb's constant, k.  Write your answer in the units of meter (m) to the second decimal place, e.g. 6.23 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
First, identify the relation between electric potential V due to a point charge Q at distance r: V = k Q / r. Next, solve for r to find the distance when V is given. W......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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What is r in the formula V = ke q/r?

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