(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Point charge q1= -5.00 is at the origin and point charge q2= +3.00 is on the -x axis at x= 3.00 cm. Point P is on the y-axis at y= 4.00 cm .

Calculate the electric fields E_{1}and E_{2}at point P due to the charges q_{1}and q_{2}. Express your results in terms of unit vectors.

2. Relevant equations

r = sqrt(x^{2}+ y^{2})

hat{r} = (vec{r} /r = x hat{i} + y hat{j}) / r

vec{E} = (k * q)/r^{2}hat{r}

3. The attempt at a solution

E_{1}will be the vector from q_{1}to point P

r = sqrt(0^{2}+ .04^{2}) = .04 m

hat{r} = (0 hat{i} + .04 hat{j})/.04 = 0 hat{i} + 1 hat{j}

E_{1}= (9*10^{9}) * (-5.00*10^{-9}) / .04^{2}(0 hat{i} + 1 hat{j})

= 0 hat{i} - 2.81*10^{4}hat{j}

i did the exact same steps to find E_{2}and

E_{2}= 6.47*10^{2}hat{i} + 8.62*10^{2}hat{j}

Am I doing something wrong? According to the steps I used because my answers are wrong and i even followed the way the steps were in the book.

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# Homework Help: Point Charge and e-field

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