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MIT 8.02 Electricity and Magnetism, Spring 2002 13 Online
OpenStudy (anonymous):

vector addition in coulomb's law is confusing for me..to find the point where E is zero for a configuration of +3c and -1c ,should I put two minus signs for E due to -1c(one for negative charge and one for negative direction of the field there)?

OpenStudy (anonymous):

|dw:1378656634548:dw| is this correct..considering the value of R is different from each other..

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