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Consider two point charges +Q and -Q located at x= -a and x= +a on the x-axis. L

ID: 2140280 • Letter: C

Question

Consider two point charges +Q and -Q located at x= -a and x= +a on the x-axis. Let point A be the origin, B be on the x-axis at x=

-a/2, C be on the x-axis at x= +a/2, D be on the y-axis at y= +a/2, and E be on the y-axis at y= -a/2. Use the expression for the electric field of a point charge to determine the algebraic expressions in terms of (k, Q, a) for the toal electric field magnitude at points A, B, C, D, and E. (In cases D and E you will have to sum two vector components to get the net horizontal E-field.) Using your algebraic expressions, evaluate the following theoretical ratios (k, Q, a should cancel leaving you with a number):




Explanation / Answer

a-37/18

b-37/18

c-5/2

d-5/2