A + 12 nC charge is located at the origin. Part A What is the strength of the el

Question

A + 12 nC charge is located at the origin. Part A What is the strength of the electric field at the position (x,y)=(5.0cm,0cm)? Express your answer using two significant figures. E = 4.3×104 N/C SubmitMy AnswersGive Up Correct Significant Figures Feedback: Your answer 4.32104 = 4.32×104 N/C was either rounded differently or used a different number of significant figures than required for this part. Part B What is the strength of the electric field at the position (x,y)=(5.0cm,5.0cm)? Express your answer using two significant figures.

Explanation / Answer

E = kQ / r^2

A) (8.99E9)*(12E-9) / (0.05)^2 = 43152 = 43200 N/C

B) (8.99E9)*(12E-9) / [ (0.05^2 + 0.05^2)^(1/2)]^2 = 21576 = 21600 N/C = 2.1x104N/C

The angle is 180+45 = 225° =>
Ebx = -21.6*cos(225°) = 17.8kN/C
Eby = -21.6*sin(225°) = 17.8kN/C

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