ch22_p59 - 59. The distance from Q to P is 5a, and the...

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5 9. The distance from Q to P is 5 a , and the distance from q to P is 3 a . Therefore, the magnitudes of the individual electric fields are, using Eq. 22-3 (writing 1/4 πε 0 = k ), G G E kQ a E kq a Qq == 25 9 22 ,. We note that G E q is along the y axis (directed towards ± y in accordance with the sign of q ), and G E Q has x and y components, with G G EE Qx Q 4 5 and GG Qy Q 3 5 (signs corresponding to the sign of Q ). Consequently, we can write the addition of components
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