* Prepare: Draw a picture of the physical situation. Let d be a positive number
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Question
* Prepare: Draw a picture of the physical situation. Let d be a positive number that is much larger than the spacing between the two charges. Consider i) the magnitude of the electric field due to only the positive charge and ii) the magnitude of the total electric field due to both charges. Which is larger (i or ii) at the point (0,d)? Which is larger (i or ii) at the point (d,0)? Use your picture to explain your reasoning in three sentences or fewer. Do not perform any calculations. . Solve: Solve the problem as posed, which will involve adding vectors. (Do not simply plug numbers into an odd-looking formula you found on the internet, as this will not help you understand course concepts. You do not need anything beyond what's in the covered sections of your textbook to solve this problem.) Assess: Are the numbers you calculated during your solve step consistent with the predictions you made in your prepare step? Explain why or why not in three sentences or fewer.Explanation / Answer
q = 4 nC , d = 3 mm
(a) (x,y) = (20 cm , 0 cm)
Electric filed due to dipole on bisector line is
E = -kp/r^3
dipole moment p = q*d
E = -(9*10^9*4*10^-9*0.003)/(0.02)^3
E = - 13500 N/C
(b) electric field due to dipole on axial line
E = 2kp/r^3
E = -(2*9*10^9*4*10^-9*0.003)/(0.02)^3
E = -27000 N/C
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